I went to work yesterday at 4:30pm and showed people my phone all day as well as had the screen on the entire time for my lunch. Got home at 11:45pm and my battery was at 91%. This is on LTE the entire time also. My Nexus was usually at 60-70% by the time I got home.
AT&T | Samsung Galaxy S III SGH-i747
Verizon| Samsung Galaxy Nexus SCH-i515
Verizon| Samsung Galaxy S (Fascinate) SCH-i500**
AT&T| Samsung Mythic SGH-a897
AT&T| Samsung Blackjack II SGH-i617
Cingular| Motorola Razr v3
** = currently owned