I also came from a Palm Pre Plus and now have the HTC Trophy. My Pre, with what I would consider average use throughout the day would be crushed by dinner time if I didn't charge it on my 30 minute drive home from work. I am really impressed with the Trophy's battery life. When I plug it in at night I usually have 40-50% left on the battery. I've been hitting the podcasts hard lately and even after draining my bluetooth earpiece with 4 hours of podcasts I can still make it through the day without a charge and still have about 20-30% left on the battery.
I have gmail and hotmail pushing out mail to me, average maybe 20-25 received, 4-8 sent daily. I don't do much browsing, I read a lot of feeds with wonder reader though, play maybe 20-30 minutes of some games. Facebook at least once an hour if not more with a little Twitter mixed in. Average on the texting and roughly 30-45 minutes of talk time a day.
I am really impressed with the batttery life!