He didn't play the classical parts. He "somewhat" says that he didn't in the commentary with the kids during the movie (which was lame, btw).
The kid can play that generic rock style very well, but the only thing that impressed me was his age. There was no personality in his solos (because it was generic!), but I do give him credit. He did as they asked, I wonder if he's an original player outside of film?
~Incidents