I believe I posted a correction on that somewhere, as I realized later I was conflating Marc Grossman and Marc Ginsberg there (which IIRC I originally stated correctly elsewhere). Ginsberg is the one who booked Wilson's first TV appearances. The part on Grossman and the ATC is correct--the link is through the Cohen Group.
Oh, thanks for that correction. That explains why that was the only source I had for that tidbit.