The MacBook Air runs Windows Vista slightly slower than other ultraportable laptops. PC World benchmarked Apple’s tiny laptop and got a score of 61. To put those numbers in perspective, the Lenovo ThinkPad X61 got an 86, which amounts to a 5 percent “actual” speed difference, says PC World. So not only is the Air not the most fully featured laptop out there, it’s also not the fastest. (That said, the Air did best the Fujitsu LifeBook P7230 by 29 points.)
Yet another reason to think long and head whether or not the MacBook Air is for you.