Yea, it's thin enough. Even too thin for some people. It needs more battery, less thin.
I totally agree. Tons of people complain about the battery capacity of their cell phones - no matter what brand they prefer. Yet, thickness is a point in every review, scaring every manufacturer from making a phone that is thicker than their previous comparable model.
For those with cell phones that have detachable rear covers there are lots of good options out there (usually a combination of battery and a new back cover to accomodate for the fatter battery) that significantly increase battery capacity if you are willing to let your device be 3-4mm thicker.