Kos isn't "tough enough? What does that mean? The guy is a three time NCAA Division I wrestling champion. This makes him the most decorated wrestler in UFC history. In addition to this he has some very serious power in either hand and is not afraid to mix it up. And the last time that he fought GSP he lost, but by decision. So you're going to have to tell me why this guy is not "tough enough" to hang with GSP.
And why GSP submits him when he couldn't submit either Alves, or Hardy who is not known for a great ground game. I have no idea who will win but those counting out Koscheck might be doing so because they don't like him. And not liking someone's personality (there's a lot to hate in Kos) is not a good reason to bet against them.
(I had to pick this thread up a little it was sagging