He talks about a lot of things, but his comments on rudiments (after 2:30) are interesting:
I don't know if I would take that completely at face value— in answering the question he seems to have a certain way of playing the rudiments in mind when saying what he doesn't/can't do. I find it hard to believe he never spent any time with them at all. Watching him solo, he does use a lot of singles— technically a rudiment, but not necessarily indicative of someone who has studied “the rudiments”— and some full drum set patterns of his own devising.
[h/t to Tony at Drummerworld]