How would we know? The 'Usage / Standby' times don't show nearly enough of the picture.
I could have music playing, set maps (or any navigation app) give me directions, and play Infinity Blade 2 all at once... and I'd be surprised if I got an hour of 'Usage' time.
Conversely, I could set my phone to Airplane Mode, start music playing, turn the screen off and get over a day of 'Usage.'
It all depends on how you use it, what your cell and WiFi signals are, and countless other variables.