Yep, he says so explicitly here: http://physics.stackexchange.com/questions/22578/can-black-holes-be-created-on-a-miniature-scale#comment52219_22601

Um... I am not exactly knighted, so I don't know why you would call me "sir" (except perhaps the jokey Isaac Newton business in my bio--- that's a nod to John Baez "crackpot index", where comparison of yourself to Newton gets you 100 points).