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Yes. A bigger heavier device can contain a bigger heavier battery to power a hotter processor chip with more GHz/cores/bandwidth/etc., as well as a bigger fan to keep it from overheating, all other things being similar. What else is new?

I would not be surprised, however, if many typical user tasks which are disk bound actually run as fast or faster on a stock Air than a stock Pro.
 
Tests geared to activating all four cores of the new chip. Has no relation to real world use. I bet they failed to point out that when you light up all four cores the MBP heats up like a gas grill too.
 
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