No, there's nothing clever about it. In fact, later in the same "essay":
Seems to me that these arguments are against sanctioning marriage in general, not one or the other type. And that is my position, too. The state should "sanction" personal relationships or reward certain types of them. I was raised by unmarried lesbians, and I turned out just fine (some would disagree =).
Those damn neocons are the root cause of all evil.