I am in the battery life is better camp too with this update. As I stated in other threads, I am getting 15+ hours and still have 50% battery. That is on the stock battery.
Today, I'm headed to the nearest LTE area (Montgomery). Will report back later on how LTE affects battery life and overall operation. I would expect it to be similar to back in mid June when I spent a week in Denver on LTE with the previously leaked MR2 update (June 10). At that time I really didn't notice any increase in battery drain on LTE versus 3G. Overall, I've noticed the biggest drain always seems to come from weak or no signal where the phone is constantly trying to find a tower. Even my old feature phones would do the same thing under similar conditions.
main reason i rooted was because of battery life. i'm on cm7 and pretty happy with it right now. Was on bamf, and that was a battery sucker too. Anybody on 4g and improved battery life? wonder if i should unroot for this.
Ok, I'm back at home now in a 3G area after spending 3 hours in LTE (with heavy use) around Montgomery. It's been about 6 total hours now (from a fully charged standard battery), and the battery still has about 35% left.