I only had the phone for two days prior to the update being released and since I was playing with the phone 24/7 I really can't make a good judgment on battery life. It seemed to be very very good at that point, considering that I played with it so much.
Post-Update:
Yesterday I wanted to see exactly how good of battery life I would get so I forced myself to stop messing with the phone unless it was just "normal" usage. I woke up and unplugged at 9:30. I read my emails (gmail) that came in over the night and responded to a few. Went out for my morning smoke and got caught up on my news sites (using WiFi). All in all through out the day I think I made four or five phone calls maybe amounting to twenty minutes of talking. Sent/recieved a hundred or so texts and spent at least an hour or two total browsing the web (with Wifi, wifi is always on). I downloaded beyondpod and downloaded a TWIT episode and listened to about half of it. At 3 AM I had 30% battery life. AMAZING!
The Palm Pre couldn't even make it from 8am till noon with out dropping down to 50 -60%. A lot of times even with out using it! The touch pro I had before I made the stupid decision of purchasing a Pre, might have been able to pull this off but I doubt it. Especially with wifi, I never used wifi with my pro because it ate batteries.