Ugh! WWDC is 2 weeks away, and that's what I'm waiting for to buy my macbook. It's so frustrating aving to wait . Now that my venting's over, I do have a legit. question: because my current computer (a compaq nx9010) performs half as well when not plugged as it does when plugged in, it has made me wonder if this is the case with the macbook. Does it perform at a lower pace unplugged?