I gotta be honest, I've seen Aerosmith live. Thought they were awesome. Never noticed Whitford. Had pleanty of chances to say hello at a few NAMM shows but didn't.
Then... I saw him play by himself at the Hendrix Experience last March. I was really blown away. He has such tasteful phrasing, killer tone, and he knows how to leave a few well-considered holes in the song.
Needless to say, I'm a fan now. Better late than never.