Great for me, in fact. I can call Jon an idiot and do the same for Richie or Alice in Chains/Soundgarden. Love all of their music. I wasn't disrespecting the entire movement, merely making a loose, casual remark. And honestly, I do believe nothing tops the gem that is These Days, be it Grunge or Technical Thrash metal.
P.S: Nirvana blows. Kurt was a poseur.