I've noticed an improvement in ilde "phantom" usage since turning Siri off and making sure the IR sensor is off. (turn off Siri, reboot, and check top front of iPhone 4S against a lesser camera like the front-facing camera on an iPad2)
For me, before turning off the sensor I was -like you- loosing 1, 2 or more percent an hour. Initially it was as much as 5% per hour but that seemed to settle down after a few (maybe four?) full charge cycles (after updating to 5.0.1), meaning letting the phone drain until it turns off on it's own then charging until it hits 100%.
Now I see about 1-2% drain per hour, maybe a little more.
I ran a test before the Siri light sensor discovery and found that starting with a fully charged iPhone 4S I could talk continually for about 168Mins until the phone shut of from battery drain (and got really warm).
I need to do that test again since turning Siri off but I suspect that since the light comes on during phone calls, as it should, battery time will be about the same.
The only thing that made any noticable difference for me was turning off Siri then rebooting the phone; turning off notifications, iCloud or anything else seemed to make no difference whatsoever.
I am curious to see (and will probably be my next test once the phone charges to 100%) how turning off WiFi sync in iTunes affects battery life. In the back of my head I have this feelign that the iPhone is maintaining a heartbeat connection with iTunes and using battery. I have iTunes launched nearly 100% of the time I'm home.
Btw, not wifi sync when plugged in, but the sync preference in iTunes so you can upload songs over the air and whatnot. I think it's called "Sync with this iPhone over WiFi" in iTunes at the bottom of the Summary tab.
Yeah, your and my drain seem fairly similar. Standby isn't too bad of an issue battery-wise and seemed to improve overall with charging cycles, but when I use the phone for anything it seems the battery just drains like mad.
One interesting thing to keep track of is to reset your Cellular Usage stat when the phone hits 100% and you pull it off charge. Just to keep a rough mental count of talk time vs. battery in your head.
For me a 60min conversation will use about 50% of my battery so something is definitately wrong there. I even told this to an Apple Genius and all I got was "Apple's working on it."
For what it's worth, I think the "Usage" stat on the phone is fairly worthless for anything relating to the user's usage but it is really interesting that it counts whatever mysterious stuff the phone is using as Usage though. Overnight my phone with no usage initially showed -without me touching it- almost an hour of "usage".
Bottom line for me of things that helped battery life are:
1. Turing off Siri and Rebooting the phone by holding the Home button and Top button down, ignoring the slider, until the phone shut down.
2. Fully draining the battery, meaning using the phone until it shuts itself off from a drained battery and then recharging it to 100% about 4, maybe 5 times. I charged it both with a Mac and a wall charger.
Hope this is helpful!