Interesting tgf, but you do have to wonder what, or more precisely, how many fine-threaded routines are there that need to distributed to 4 seperate cores?

Scene Rendering, AI, Physics and....? Now its more than likely that Physics will be handled on a GPU or Dedicated addon board, so thats hardly going to eat an entire 3GHz core up... maybe Valve are saying this so Intel send them a few token quadcore workstations as a 'thankyou!'.. if you know what I mean!