No, it's not the nasal...ity of it, it's just the very precise pronunciation. The way he pronounces his "s"'s and "t"s. obviously very similar to the "gay lisp". Well, actually, just the same as "the gay lisp." Because, obviously, he's gay.
"I can't figure out what kind of life this is, comedy or tragedy, I just know it's showbiz. And what if I don't agree with the lines I have to read? They don't pay me enough, the way I see it."