well to give you an idea ive been unplugged for about 12 hours now and im @ 39%, after being extremely conservative, minimal use, music for like 1 hour in total (was in airplane mode while playing it), flipped on 4g for about 2 minutes to quickly get some directions.
besides that, ive been on 2g the whole day, brightness off / on automatic (mostly off), juice defender on (balanced mode), and no this has been the case since i bought the phone (a couple weeks ago), it was used (if that matters). Are my standards too high? maybe because i'm coming from a blackberry that lasted 2 full days/nights even with extensive use?