I don't know why there's such "new-urbanist lobby" in the US, but in Europe you can't realize the dream of "open-road commuting" and low-density employment, not without turning the entire continent into one big suburbia. I don't think we have enough land for that.
I'm personally for public transit because of efficiency. Even if you could somehow get that "old low-density promise of commuting 20 or 30 minutes on open road", which would definitely be not a bad situation for commuting, it would still be an energy disaster. Mass transportation and high-density settlements are much more energy-efficient, and energy is one of the biggest problems we're facing as a civilization right now.