Kos beat Daley much better than Diaz did. It wasn't pretty, but he took no damage and handled him. Diaz got dropped and nearly finished twice. It was a very exciting fight, and I give Diaz his props for taking Daley's shots like that. Beyond that though I doubt he can beat the top guys until he proves it. Besides Gomi he hasn't even fought anyone elite to even be fighting GSP. He got handled by guys with good grappling in the UFC, left, beat Gomi, and hasn't fought anyone with decent grappling since besides a well past his prime Frank Shamrock. Is he a bum? No, but he hasn't even beaten anyone close to be considered as highly as he is right now. If he beats GSP I'll give him all his props, but beating Noons, Aina, Shamrock, old ass Sakurai, and old man Frank is nothing more impressive than what Kimbo was doing.