Just mounted my red Michelin Pro 3 700X23 Race tires on my Giant TCX 1. I'm looking forward to seeing what kind of improvement in speed I can make.
Going to the CX bike alone bumped up my speed by 4-5 kph but I've been riding slightly knobby 700X35 tires and I'm totally pumped to see what the skinnier slick racing tires do for me.