That is because, *gasp*, the 360 is the more powerful gaming system. It has a better GPU, and as we all know, games love GPU power, not CPU power. Sony seems to think that the Cell is going to give it an edge somehow, but in reality it won't. Then again, Sony also claimed that the PS3 is capable of 2 TFLOPs when in reality it is closer to 400 GFLOPs (somehow the ~200 gflops 7900GT became a 1.8 tflop beast when sony's marketing team got a hold of it )
Sorry, not even close. The 360 has no where even close to the same power. Oh and btw they share the same core processor, sony just has more cores.
Killzone 2 and upcoming God of war 3 put that silly rumor out of it's misery. Don't get me wrong the 360 is nice, but it is hardly more powerful.