You will find pros using clinchers in the TT. They seat well and are close in lightness - and they get paid to.
I am not aware of any WT pros that ride clinchers most-of-the-time.
Edit Add for James:And not aware of a WT team that races on them.
The clincher setup is generally 300g more and they are still not equivalent in handling. Except, as stated, the clinchers can mount better.
Last edited by Doge; 02-20-18 at 12:55 PM.