And as for iaz's BJJ, when did you last see Kos,Fitch or GSP submitted? In some of their first fights, years ago. Sorry to say, Diaz doesnt handle being on his back very well, and its not like he has been using his BJJ much.
Sherk, Diego, and Riggs brought him to a dec, so can the aforementioned.
And when was the last time Diaz fought, and beat a top 10 WW? Maybe Marius? I think when/if he fights in the UFC its going to be a rough time for him.