Wow, I am seeing the exact opposite. I am getting 6 hours of sleep/standby for every 10% battery drop and about 40 to 45 minutes of wifi web surfing per 10% battery drop.
Currently running the 7 slot 1Ghz kernel under 2.2 Beta 2 (as I call it).
Just installed the new baseband update this morning to see how that affects battery life.
I had the same numbers in stand-by. Unfortunately most of my waking hours my phone is not in stand-by for long periods.
The problem is actual use.
Few calls/texts/tapatalk and it heated up and burned through my battery.
Only clocked it to 800
Temps were not real high 105 dees grees but I wont suffer through horrible battery life. No way no how : )
I will load up the next round of leaks and re-test but for now I'm not liking Froyo.
The one positive is that it does run EXTREMELY well (performance) but again I need and want some decent balance.