Could it be just coincidence?
I'm 7 hours 12 minutes in and at 80% according to the battery indicator provided with the phone (no battery widget).
Granted I didn't do much today, but usually around this time with light usage I am around 50-60%.
It could be the wifi reception. I usually turn on wifi reception at my university when taking summer classes. However, I used to get poor signal.
This is anecdotal at best, but my battery level has only dropped about 5% in the 6 hours I've been at work according to JuicePlotter. I don't use my personal phone for work so it just sits there aside from my checking the occasional text, personal email or call. The battery drain while browsing the web and reading NewsRoom articles during my ~45 minute morning train commute appears to be the same.
I don't know if the better standby battery life is due to the update or something else, but I'm certainly not complaining...being at around 80% 8 hours after I unplugged from the charger with my regular usage habits is awesome.
My battery life has a HUGE improvement. I'm almost at 24 hours right now, and still have 8% left. Normally I would have to recharge after about 8 hours or so, so we're talking about a 300% + improvement. Plus right now I have my music playing in the background, screen @ 100%, gps & bluetooth on-- just to drain my battery so I can recharge it... And it still refuses to die!
It seems I am getting better battery life.... I am running on 9 hours at the phone is at 55% remaining.... Nothing turned off except the 4G antenna, mail and gmail sync every hour during the day (7am - 9pm then to 4 hour sync) Facebook is set to every hour and weather is set to every 2 hours. I don't use Twitter or Flickr or any other "Social Media" a little text messaging (20 - 30) a little web surfing (about an hours worth) 20 - 30 pictures and uploaded about 10 to Facebook and E-Mailed about 5 of them. Sent 4 other e-mails with out attachments and received about 20 e-mails over the course of the day.
I was typically getting 12 - 16 hours depending on how heavy or light I was on it.. Can't really recall a day like today getting to 6pm with over 50% remaining..... Looks like I could push 20 hours out of the charge today which would be a decent improvement...
I had the same issue...pulled of the charger at 8 AM, and was at 92% after charging all night.. But, at 6:37 PM with casual use on the phone I'm still at 70% which is amazing! When I had the Palm Pre I ALWAYS had to recharge it around 3-4PM to get me through the rest of the evening.
I picked today to quit using my task killer to see what would happen with all those damn apps that start on boot... 12 1/2 hours later I just hit the yellow with 1 hour 35 min. of talk time and a lot of other crap. I would only use app killer manually and all those damn apps keep starting so I gave up and I think it helped my battery. Wifi and gps on all day, I think the update helped.
Way better battery life when idling - only about 2% drain per hour with light use. I've only checked a few emails and message boards and seeing much better battery life. However, I have been using Wi-fi all day instead of 3G now that the Wi-fi works at my work (pre-patch the signal wasn't reliable enough).
I am unplugged for nearly 14 hrs now and have 40% remaining with moderate use. Also used live wallpaper all day. Last time I ran live wallpaper with moderate use I was nearly dead in under 8 hrs. Needless to say I am ecstatic. One odd problem. I read in the update thread that someone lost use of camera after update so I turned on my camera to see if it works but did not even take a picture. Simply turned camera on and returned to home. In my battery life it shows that camera is responsible for 90% of battery usage today. Emailed, texted, tweeted, and interneted all day, but took no pics. ???
Oh Yeah! Major improvement to battery! I can go all day now - and I never used the facebook app or whatever they targeted for improvement. YoooHaaa!
I was really starting to get discouraged about the power life, but now I'm super gland I made the switch.