The evidence is anecdotal at best, but today is Day 3, I charged my Incredible (stock battery) from practically dead (~10%) for four hours this morning (8AM - 12PM), and it's been running since. Current stats (11PM):
11h 4m 3s since unplugged
Overall Current Battery Level (Green Bars) - 40%
Android System - 23%
Cell Standby - 24%
Phone Idle - 19%
Bluetooth - 10%
Display - 8%
Wi-Fi - 7%
Voice Calls - 4%
Camera - 3%
Internet - 2%
11h 4m 3s since unplugged
Overall Current Battery Level (Green Bars) - 40%
Android System - 23%
Cell Standby - 24%
Phone Idle - 19%
Bluetooth - 10%
Display - 8%
Wi-Fi - 7%
Voice Calls - 4%
Camera - 3%
Internet - 2%
On day 4, stock "HTC-DI-1300" from full charge to right now 11h 18m 12s and have 13% to go. So fare today did about 10-calls, 2-hour internet, 1-hour game play, 12 texts, use shopsavvy about 15 at the store, Wi-Fi is always on but not looking for locations, Bluetooth off, GPS off. Only thing I do have on my phone to help is an auto appz killer for when my phone sleeps. When I unlock it every thing works.