He is really talented and for what he does the Korg is great....
BUT, that said IMHO, any of todays arranger would sound good playing the fast music with mostly distortion guitars.

I have yet to find much of the music I love (and it is a wide variety) played on the Korg arrangers.
I have to assume that Korg best suits the youger more modern musician and especially more in Europe (Mid East). Of course that's not 100%.