Yeah, makes people look like they forgot to how to fight. Finds peoples' flaws and capitalizes on it. Hendricks tends to rush in and throw looping punches. I know his wrestling is top notch, but it will be interesting to see how he fares against GSP. There's a good chance GSP will still take him down.
GSP has fought guys with good ground games... BJ, Fitch, Hughes, Shields, Diaz (tho not so much wrestling but dangerous jui-jitsu... GSP made him look silly), Koschek. It will be a tough fight, but I think GSP gets it done.
In other news, I read his mentour thinks he should retire after this fight. Interesting. Makes sense to go out on top, I suppose. Dude has plenty of dough.