I've always heard that about him.
I saw him at one clinic and he welcomed us all to come up and get autographs and talk and as we all lined up he started talking with his drum tech and basically ignored every single person who came up to him other than to sign a glossy photo. When it was my turn (I was perhaps 14), I said it was really great to see him play and thanked him for the clinic. He never stopped talking to his tech, never broke eye contact, took my photo, signed it, and handed it back to me without any other acknowledgment that I was there.
Still, he's an amazing drummer and this accident is just freakishly weird. At least they are recovering.