it also says that SC2 will only use two cores at a time. The core2quad is just a hair bit faster than the core2duo because it can use the extra 2 cores for random other processes in the background, but SC2 obviously likes the AMD chip a bit more.
i'm not worried about the Q6600, it can hold its own when properly overclocked, i'm more worried about the 6000+ beating it out, the 6000+ is ok, but certainly not better than a Q6600, even at stock speed. There is just something weird about a 6000+ beating a Q6600 in ANY game. that is what is causing the confusion.