Arrrggh! I guess I need to try to express myself better! In the testing of the MacBook, with either emulator running XP, the battery time is about 150 minutes. With either emulator running Win 7, the battery time jumps up to about 215 minutes, roughly a 40% increase. When testing the MacBook Pro, there is virtually *no* difference in the battery life between the emulators running XP or 7. I'm wondering why there is a (significant) performance increase with Win 7 on the MacBook, vs. XP, but no concurrent performance increase on the Pro?

Whew! Thanks for your help!
If you're not outraged, you're not paying attention...