The whole battery life things seems a bit academic to me really--so much depends on personal level of use.
Anything that involves having the display on (so basically doing anything with the phone) is going to drain the battery. Drooling over long battery life numbers is pointless--if you use the phone much the battery is going to be used, and the more you use it the faster that will happen.
In my experience using AIO versions since V3 and both Droidzone and snq kernels it's possible to get 24 hours plus, but with heavy use this drops fast and expecting more than about 12-15 hours under these conditions is wishful thinking.
DEVICE-> Galaxy Note 2 N7105T