"By losing the small, sluggish 26 inch-wheels and installing a pair of light, nimble 700c wheels"

I guess I'm missing the point of how larger wheels help you go faster. I like larger wheels because it's easier to roll over crap, but I'm not seeing how a good 700C wheel will be a whole lot faster on a smooth road than a good 26" wheel.

Not to mention which, a lot of times there are frame/fork clearance problems as well. There's a reason manufacturers actually make different frames for 29ers.