i was wondering about this as well.

the battery life certainly seems better for me with PR 1.3 (i was running virutally no daemons with my PR 1.2 setup either). however, the biggest difference seems to be in the battery remaining animation.

with PR 1.3, the battery remaining animation stays full (100%) for at least an hour after the phone is unplugged. obviously, the battery is slowly discharging, as normal, but the phone is choosing to present the information differently.

i was initially worried that the animation wasn't working at all, but it eventually started coming down. i installed battery eye to have a closer look, and the value that battery eye gives is very different from that implied by the phone's battery remaining animation.

at this exact moment, battery eye is showing 90%, which is in-line with the phone being off the charger for a few hours. however the status bar animation still shows 100% full. this disconnect appears consistent throughout the battery level range (i ran the battery down to about 20% yesterday to test it). the status bar animation is consistently 15 to 20% higher than i'd expect, given my normal battery consumption on PR 1.2 and the results from battery eye.

so... battery life seems improved, but i'm having a very hard time quantifying it.