Was he claiming to represent them? I know Brother Peter referred to Archbishop Lefebvre being his hero, or something along those lines, but that doesn't mean some one is speaking on behalf of SSPX.
Unofficially, perhaps. I know that he's been an apologist for the SSPX, going as far as to dismiss allegations of sɛҳuąƖ assault by some of their priests. But I've heard they themselves have kept him at a distance.