here's my story, hope it helps:
I wasn't having the 1 1/2 - 2 hour usage problems i have seen here, actually i didn't even start checking the usage stats until yesterday after reading through this thread. I was having the battery drain 1% every 3 minutes or so - seemed mostly to happen when browsing while on AT&T LTE with or without a good signal. The thing that was most troubling was that i was losing 1% every 5 or 6 minutes while on wi-fi as well - a lot poorer life than on my previous iphone 4, although i did notice that the 4's battery life wasn't as good after upgrading to ios6 as well.
What i did was sort of a compromise to a setup as new phone by resetting via General -> Reset -> Reset All Settings. I'm still discovering which settings this resets to factory defaults but it didn't erase any media or app settings - just the OS settings. Be warned that it does reset wifi passwords, wallpaper settings, all the stuff in "general", etc. Mail accounts remained intact. I basically did this after reading this
macworld article seeing i didn't want to have to reinstall all my apps, mail accounts, etc. I noticed the battery didn't seem to drain as fast after doing this overall (on wifi mostly) - but still drained quickly on LTE (1% every 4 minutes or so).
So last night i had about 4% battery at midnight and i left it off of the charger as i wanted it to fully drain. This morning at 8:30 it still had 1% and finally died when i used it for about 10 minutes. Final usage stats were 9 hours, 3 minutes and 1 day, 1 hour standby time.
I'm going to see if a couple of cycles improve the battery indicator - i'm starting to think that as mentioned earlier in this thread, the battery indicator and/or battery itself takes a few cycles to get up to speed.