Yes. He has written theme songs for MTV, CNN, and SEGA, among others... Is that considered serious?
Oh yeah, and he was voted 8th best guitarist (as I can remember)in the world in some japanese mag... Oh yeah, and also , John Petrucci and Steve VAI are fans...
He is also the man behind bumblefoot... And he is pretty much insane (what you can hear there is what he does that sounds closest to a song)