AnandTech's recent MBP 15" battery tests - he gets from 6:30 to nearly 8:25 (h:m) in his tests.

I think there must be a flaw in his tests. If he didn't pay close attention (his tests are looped) then his scree may have been turning off instead of staying at the brightness he pre-set.

I can't see how the new 15" can beat the 17" while equipped with a smaller battery, especially since Apple itslef claims it should have a shorter life.