Nick's TDD isn't nearly as bad as people think it is. Nick stuffed 17 of 19 TD attempts from Sean Sherk. 5 out of 8 TD attempts from Riggs, 6 of 11 from Diego. Sometimes it looks like Nick barely tries to stuff TD's because he's so confident on his back, and he gave Diego a hell of a fight from his back and even dropped the guy in the 3rd round with a punch.
When BJ took him down, Nick tried to reverse it so he can get top position but BJ did a good job of not letting that happen.
Nick knew that Sherk was going to shoot for TD's nonstop, and Nick stuffed all but 2, and those 2 TD's Sherk landed, he got swept both times pretty easily and he outstruck him, and also outstruck Riggs.
His TDD isn't anything like GSP's of course, but it's not AS bad as people think. Nick is just comfortable off of his back, I think Nick's TDD will look a little more improved against GSP because he knows GSP is going to want to take him down sooner or later. The stance he had against Sherk worked well to stop the TD's, who knows. We'll see what happens, it's going to be a hell of a fight though. Nick has always made it a hard fight for his opponent of his back and even forced fights back to the feet sometimes because of his guard.