Hate to keep beating a dead .....but, battery review results have to be taken with a grain of salt. One criteria...can it make it through a typical business day....appears so. If it can't, we have a problem but not an earth-shattering one. I usually have a charger in the office, home, and car.
Reviews, from the MWC to now, also have to be taken in context of varying firmware versions, device setups, test conditions, etc. Also, keep in mind that the device optimization is allowing a smaller battery to achieve nearly comparable results, again based upon what we have heard to date, powering a QHD display and faster chipset, both of which are more energy efficient, and improved features and performance. TouchWiz has been slimmed down. These result compared to bigger brother powering a slower machine with a heavy TouchWiz footprint and lower result ion screen and not the same features, with card slot, we might have gotten a bigger battery. Sometimes, it's best to wait and not be an early adopter as more UI and OS fixes could be rolled out to address nagging issues.