You would think, but this is not the case. I reinstalled all apps, changed all settings back, wallpaper, everything (wrote everything down) within 10 minutes of the factory reset. The only thing i didnt re-enable was Facebook for HTC Sense and stuck with Facebook for Android (dont setup a facebook account while doing initial setup) since it was shown to cause MAJOR battery issues on the incredible.
My battery life is now night and day and im not running a task killer (other than task os) and everything is EXACTLY the same as before the reset (minus FB for HTC). I'm on track to make it to around midnight with around 20% left under very heavy usage. If I babied it a LITTLE i could EASILY get 2 work days out of 1 charge, for comparison sake, my phone died on me at work yesterday around 4 pm when it was idle over half the day (in meetings) before I did the reset last night. I work in an area with HORRIBLE sprint coverage and that does not help one bit (brought my blackberry tour to 25-30% daily until i bought a new charger for the desk and BB has amazing battery life), at home I expect to get great battery life out of this phone now!