Dalvik is dead, long live Dalvik! DO NOT MERGE
Yeah I've heard lots of different things so I'd be inclined to think it was in my head, but I literally went from a full day of charge to two, its unbelievable.. Could be a combination of other stuff but I run all these apps watch video everything...I just make sure wakelocks don't show up.
Testing has shown between 0-3% difference in battery life, basically within the margin of error to show no noticeable improvement with ART. I think the placebo effect is just strong since in theory it should use less once the compilation process is completed.