Here's a log from my recent screen blackout... note that it did not prompt me to login with password for unlocking from sleep.
7/25/13 10:20:22.406 PM WindowServer[77]: CGXSetWindowBackgroundBlurRadius: Invalid window 0xffffffff
7/25/13 10:20:22.000 PM kernel[0]: PM notification timeout (pid 194, Jettison)
7/25/13 10:20:22.000 PM kernel[0]: PM notification timeout (pid 203, Google Chrome)
7/25/13 10:20:22.000 PM kernel[0]: PM notification timeout (pid 268, Google Chrome He)
7/25/13 10:20:22.000 PM kernel[0]: PM notification timeout (pid 270, Google Chrome He)
7/25/13 10:20:22.000 PM kernel[0]: PM notification timeout (pid 272, Google Chrome He)
7/25/13 10:20:22.000 PM kernel[0]: PM notification timeout (pid 273, Google Chrome He)
7/25/13 10:20:22.000 PM kernel[0]: PM notification timeout (pid 274, Google Chrome He)
7/25/13 10:20:22.000 PM kernel[0]: PM notification timeout (pid 275, Google Chrome He)
7/25/13 10:20:22.000 PM kernel[0]: PM notification timeout (pid 345, Google Chrome He)
7/25/13 10:20:22.000 PM kernel[0]: PM notification timeout (pid 399, Google Chrome He)
7/25/13 10:20:22.407 PM loginwindow[57]: find_shared_window: WID -1
7/25/13 10:20:22.407 PM loginwindow[57]: CGSGetWindowTags: Invalid window 0xffffffff
7/25/13 10:20:22.407 PM loginwindow[57]: find_shared_window: WID -1
7/25/13 10:20:22.407 PM loginwindow[57]: CGSSetWindowTags: Invalid window 0xffffffff
7/25/13 10:20:22.419 PM loginwindow[57]: ERROR | -[LWBuiltInScreenLockAuthLion preLoad] | guestEnabled is true, but guest mode is not set to a usable value
7/25/13 10:20:22.547 PM WindowServer[77]: Created shield window 0x16a for display 0x04273c00
7/25/13 10:20:22.549 PM WindowServer[77]: device_generate_desktop_screenshot: authw 0x7f971c149b30(2000), shield 0x7f971c149580(2001)
7/25/13 10:20:22.562 PM com.apple.time[11]: Next maintenance wake [Backup Interval]: <date: 0x7f9d53209ac0> Thu Jul 25 22:40:49 2013 EDT (approx)
7/25/13 10:20:22.562 PM com.apple.time[11]: Requesting maintenance wake [Backup Interval]: <date: 0x7f9d53209ac0> Thu Jul 25 22:40:49 2013 EDT (approx)
7/25/13 10:20:22.565 PM WindowServer[77]: device_generate_lock_screen_screenshot: authw 0x7f971c149b30(2000), shield 0x7f971c149580(2001)
7/25/13 10:20:23.000 PM kernel[0]: 2376.861084: AirPort_Brcm43xx::powerChange: System Sleep
7/25/13 10:20:23.000 PM kernel[0]: AppleCamIn::powerStateWillChangeTo - root-domain power state = 0x00000002 (flags=0x00000004)
7/25/13 10:20:24.000 PM kernel[0]: en0: BSSID changed to 58:6d:8f:73:4f:af
7/25/13 10:20:24.000 PM kernel[0]: LE is supported - Disable LE meta event
7/25/13 10:20:24.000 PM kernel[0]: wlEvent: en0 en0 Link DOWN virtIf = 0
7/25/13 10:20:24.000 PM kernel[0]: AirPort: Link Down on en0. Reason 8 (Disassociated because station leaving).
7/25/13 10:20:24.000 PM kernel[0]: en0::IO80211Interface::postMessage bssid changed
7/25/13 10:20:24.000 PM kernel[0]: IOThunderboltSwitch<0xffffff8030941400>(0x0)::listenerCallback - Thunderbolt HPD packet for route = 0x0 port = 11 unplug = 0
7/25/13 10:20:26.273 PM hidd[61]: MultitouchHID: device bootloaded
7/25/13 10:20:26.000 PM kernel[0]: AppleThunderboltNHIType2::waitForOk2Go2Sx - retries = 2
7/25/13 10:20:26.000 PM kernel[0]: Wake reason: SPIT (User)
7/25/13 10:20:26.000 PM kernel[0]: 2379.290302: AirPort_Brcm43xx::powerChange: System Wake - Full Wake/ Dark Wake / Maintenance wake
7/25/13 10:20:26.000 PM kernel[0]: AppleCamIn::powerStateWillChangeTo - root-domain power state = 0x00000003 (flags=0x00000002)
7/25/13 10:20:26.000 PM kernel[0]: AppleCamIn::wakeEventHandlerThread
7/25/13 10:20:26.000 PM kernel[0]: Previous Sleep Cause: 5
7/25/13 10:20:26.000 PM kernel[0]: AppleHSSPIController::HandleMessage Device Wake by Button
7/25/13 10:20:26.000 PM kernel[0]: IOThunderboltSwitch<0xffffff8030941400>(0x0)::listenerCallback - Thunderbolt HPD packet for route = 0x0 port = 11 unplug = 0
7/25/13 10:20:26.000 PM kernel[0]: IOThunderboltSwitch<0xffffff8030941400>(0x0)::listenerCallback - Thunderbolt HPD packet for route = 0x0 port = 12 unplug = 0
7/25/13 10:20:26.000 PM kernel[0]: TBT W (2): 0x0100 [x]
7/25/13 10:20:26.000 PM kernel[0]: en0: 802.11d country code set to 'X0'.
7/25/13 10:20:26.000 PM kernel[0]: en0: Supported channels 1 2 3 4 5 6 7 8 9 10 11 12 13 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 144 149 153 157 161 165
7/25/13 10:20:26.692 PM Spotify[211]: Reachability Flag Status: -R tc----- networkStatusForFlags
7/25/13 10:20:26.696 PM WindowServer[77]: handle_will_sleep_auth_and_shield_windows: NULL auth_window
7/25/13 10:20:26.699 PM configd[17]: network changed: v4(en0-:192.168.1.112) DNS- Proxy SMB
7/25/13 10:20:26.713 PM Spotify[211]: Reachability Flag Status: -- ------- networkStatusForFlags
7/25/13 10:20:26.722 PM WindowServer[77]: Created shield window 0x16b for display 0x003f003d
7/25/13 10:20:26.722 PM WindowServer[77]: handle_will_sleep_auth_and_shield_windows: NULL auth_window
7/25/13 10:20:26.725 PM WindowServer[77]: Created shield window 0x16c for display 0x003f003e
7/25/13 10:20:26.725 PM WindowServer[77]: handle_will_sleep_auth_and_shield_windows: NULL auth_window
7/25/13 10:20:26.825 PM Spotify[211]: Reachability Flag Status: -- ------- networkStatusForFlags
7/25/13 10:20:28.000 PM kernel[0]: en0: 802.11d country code set to 'US'.
7/25/13 10:20:28.000 PM kernel[0]: en0: Supported channels 1 2 3 4 5 6 7 8 9 10 11 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 144 149 153 157 161 165
7/25/13 10:20:28.000 PM kernel[0]: AppleCamIn::handleWakeEvent_gated
7/25/13 10:20:28.000 PM kernel[0]: AppleCamIn::acpiControlS2ChipPower - powerState=0, status = 0x0, result_value = 0x0
7/25/13 10:20:30.000 PM kernel[0]: 2383.850682: MacAuthEvent en0 Auth result for: 58:6d:8f:73:4f:af MAC AUTH succeeded
7/25/13 10:20:30.000 PM kernel[0]: wlEvent: en0 en0 Link UP virtIf = 0
7/25/13 10:20:30.000 PM kernel[0]: AirPort: Link Up on en0
7/25/13 10:20:30.000 PM kernel[0]: en0: BSSID changed to 58:6d:8f:73:4f:af
7/25/13 10:20:30.000 PM kernel[0]: en0::IO80211Interface::postMessage bssid changed
7/25/13 10:20:30.000 PM kernel[0]: AirPort: RSN handshake complete on en0
7/25/13 10:20:30.864 PM airportd[408]: _doAutoJoin: Already associated to “sigal5ghz”. Bailing on auto-join.
7/25/13 10:20:30.893 PM airportd[408]: _doAutoJoin: Already associated to “sigal5ghz”. Bailing on auto-join.
7/25/13 10:20:30.929 PM airportd[408]: _doAutoJoin: Already associated to “sigal5ghz”. Bailing on auto-join.
7/25/13 10:20:31.638 PM Spotify[211]: Reachability Flag Status: -R tc----- networkStatusForFlags
7/25/13 10:20:31.644 PM configd[17]: network changed: v4(en0+:192.168.1.112) DNS+ Proxy SMB
7/25/13 10:20:31.662 PM UserEventAgent[11]: Captive: en0: Not probing 'sigal5ghz' (protected network)
7/25/13 10:20:31.669 PM configd[17]: network changed: v4(en0!:192.168.1.112) DNS Proxy SMB
7/25/13 10:20:31.670 PM Spotify[211]: Reachability Flag Status: -- ------- networkStatusForFlags
7/25/13 10:20:32.708 PM Spotify[211]: Reachability Flag Status: -R ------- networkStatusForFlags
7/25/13 10:20:35.019 PM System Preferences[419]: Cannot call setInetDServiceEnabled:enabled without first being authenticated
7/25/13 10:20:35.054 PM ntpd[73]: ntpd exiting on signal 15
7/25/13 10:20:35.167 PM ntpd[426]: proto: precision = 1.000 usec
7/25/13 10:20:35.175 PM com.apple.time[134]: Interval maximum value is 946100000 seconds (specified value: 9223372036854775807).
7/25/13 10:20:56.770 PM com.apple.backupd-helper[410]: Not starting Time Machine backup after wake - failed to resolve alias to backup volume.