He must not be too much of a Guns N' Rose's fan, he rarely includes them in any of his countdowns. He didn't even include Axl in his top 20 Rock singers of all time ?!?!
He has mentioned, however, the GN'R management comes after him whenever he mentions them. He says the are serial Blockers.
Seriously, he is only trying to recognize their talent and possibly introduce them to new fans. Come on GN'R management!