So you don't have to fish back for the first commands i am referring to (this might be useful for new people finding this thread):
Summer Storm Pictures
Potential success--finally--but guardedly optimistic.
I've been dealing with this wake-from-sleep problem for some time--the long delay after opening up my "sleeping" 15-inch "Retina" MacBook Pro, along with a black screen for almost 10-seconds, before my log-in dialog screen finally appeared.
Up to now none of the "tinkering" seemed to have helped, and per a conversation I had with a senior AppleCare tech, my understanding was that the problem was only going to be corrected at the factory level where an adjusted chipset could be implemented into the build/assembly phase.
In another thread there has been a lot of "voodoo" running Terminal commands, which also had not brought success.
Out of morbid curiosity or plain blind optimism, I decided to research an official Apple developer page offered up by another contributor on the other thread that explained the various Terminal commands as far as power management. I came up with a last-ditch effort and assembled several Terminal commands.
These were the Terminal commands I ran and in this order:
sudo pmset -a hibernatemode 3
sudo pmset -a autopoweroff 0
sudo pmset -a autopoweroffdelay 36000
sudo pmset -a standby 0
sudo pmset -a standbydelay 36000
sudo pmset -a acwake 0
Then I closed the lid to my MBPr around midnight last night and un-plugged it. Around 6AM this morning (5-plus hours later), I woke up, opened the MBPr and it instantly went right to my user-password log-in dialog--no delay or dark screen.
I'll be curious now to see if others, likewise vexed for so long with this issue, have similar success, and am further hopeful that the settings "stick" beyond any expected OS or other future updates.
I will update my own experience in a couple days, success or failure—hopefully success.
Good luck.
Note: The 36000 in the Terminal commands represents 10-hours in seconds. For me that will work as I am never not on my MBPr more than 5-8 hours at any one time, and if so, I don't mind hibernation mode setting in to save battery power.