lol the mtb forum is awesome nowadays, you can launch a ****storm with any thread
On topic though: I bought a 29er mtb specifically for my commute. I put big apples on it (is that enough for another ****storm?) and it rides very comfortably, so much so that I am faster on it than on my road bike for the moderate effort level I want to ride at. If you plan on going all-out on every ride, the road bike is superior in my opinion. If you're going to pace yourself and ride moderate speeds, I think the mtb will be far better. The only time I miss my road bike is in wicked headwinds.