Pshaw, he's not all that. Too art-faggy, bland, and overly technical for my taste. He's the kind of guitar player that makes me love playing the guitar the way I do, raw and not too clean.
I don't mind a couple minutes of a Vai or Satriani, but I can listen to Page or Johnny Winter all day long.
But supposedly Vai himself was playing the non slide part at the end (I think that's what Arnold said in the Guitar Thread). So basically, it was Vai beating Vai. Heh.