Two problems there:
1) PC World is using their benchmarks. Who KNOWS what the heck those are. They might have just given the MacBook and extra point or 10 just because it's a Mac.
2) They might have taken the cheapest notebooks from Toshiba, Dell, etc and the most expensive MacBook they could buy. For example, they have only tested 1 tablet PC in the HISTORY of PC World, a Gateway tablet, which isn't one of the better Tablet PCs on the market.