It doesn't seem terribly crackpotish to me. He's absolutely correct in pointing out that it's very sloppy to define "computability" as "What the Universal Turing Machine Can Do." It's also not unreasonable at all to talk about variables that change with time, and he's absolutely correct that this is a gap in complexity theory. One which should excite new grad students, because eventually it will net someone a lot of academic fame and one hell of a PhD thesis.

Personally, I'm very interested in this and I'm going to keep an eye on it.