rafreeb,
- I have noticed that iMessage drained my battery 7 % on 3 19 minute tests, being on WiFi and in a "4G" area...This would be something an update should fix.
- BlueTooth drains pretty fast also..Again update should fix..
Other than that, I dont see many other issues (unless there is a hardware issue). I think problems people are having with iOS 6 features that many people are activating that use a lot of the phone...
- Location Tracking has always been the biggest killer of battery, some programs request it and use it when not needed.
- Turning on every program for notifications when really not needed for a lot of programs
- Having push on for all email accounts when not needed
- Using iCloud for backup of the phone, will have to send all the new changes often
- LTE on in an Non-LTE area, constantly making it search for the towers.