It doesn't matter to me what the pros use because either tubular or clincher in the majority of peloton still have tubes in them.
My comments and concern is for the newly introduced TUBELESS clinchers that have been trialed. ===================================== "Yeah you point a finger back far enough and some germ gets blamed for splitting in two."
Both work equally well, with tubulars being more flat resistant, faster accelerating, and much lighter, and easier to change if flat, plus you may be able to ride them flat if need be.