This is pretty pointless. When dual core came out, people said the same thing. You can clock a single core (maybe a celly) to 5GHz on air, but only take a dual core (at the time) to about 3.5GHz. But now that games utilize 2 cores, a dual core is better.
Right now, you can clock a quad to 3+GHz without a problem. Even a dual core at 3GHz will game fine. If you are playing at high resolutions (1080p) you will be more GPU bound than CPU since as you get higher resoltions it stresses the GPU more.
Saying the the Quad is bad at gaming is completely wrong. It is going to be fine at gaming until you get your SLI of $600 cards and notice that you only have 80fps instead of 100.
And as far as benchmarks, quads own that. Right now, I really dont see a reason to get a dual core unless your are a hard core gamer and only game or you dont want to spend $200+ on a CPU.