Noticed quite a boost on my battery life since the latest update. Before I'd be away from a charging point doing general activity (checking twitter, playing music, watching a youtube video) for 10 hours and be down to about 52% before I could charge it again. Today though, after 10 hours, I'm at 68% battery life.
Maybe its just happy coincidence, but that's a pretty huge boost in battery performance from me.
Lumia 925 btw.