My fault all, never intended for it to be quite this restrictive, and I've never heard of a recumbent commuter. That is pretty cool!

I was looking at it from a frame build-up perspective (grab an old "X" and turn it commuter). I would guess that pupose built bybrids would depend on tire configuration- my wife's Trek Navigator 50 falls under MTB in my book. The 26" wheels and more upright riding position are my reasoning. The Trek Portlands and the like would be more road-bike'ish.