Is Scott Ian really a mind-blowing guitarist?

In general I've always enjoyed Anthrax's riffs and always rated Scott Ian as a good Guitarist. He was certainly one of the best players during Thrash's heyday in the 80s.
 
YES, Scott is an amazing guitarist. Tony Iommi may have wrote all the riffs in heavy metal, but Scott figured out how they should sound. March of the S.O.D., greatest riff ever played, period. Scott's often imitated, never duplicated and always evolving.
 
Hi Brentney S.!
I agree with you that "March of the S.O.D." is the greatest riff ever played, fu***n brutal. S.O.D. is the only band that can blow Anthrax away!

Peace!