I'm not really sure what the word "genius" really means though, at least in this context. For some reason I can accept that someone like Isaac Newton or Albert Einstein is a genius, but it's harder to say in the arts. E.g., was Zappa a genius? I don't know, but he was talented and worked hard as hell, so he made a lot of great music but genius. Who knows? It probably doesn't matter one way or the other.