My standby time has dropped from well over 1 day to about 1:45 to complete battery discharge. From a full charge, with location off, wifi off, bluetooth off, notifications off, and push off, with brightness well below 1/2, it takes less than 2 hours of non-use to fully deplete the battery. My iPad2 has a similar, but not as severe, drain.
Oh, and all applications killed that were running in background, and rebooted while still on full charge - still depletes in less than 2 hours with NO use for anything.