Fair enough. Till said "every fighter" and "every" is wrong.
GSP, Cowboy and others have talked about the same thing Till did. So it's quite evident that lots of fighters have those awful pre-fight nerves. And while a small subset of Neanderthal type fans will undoubtedly think that proves Till, Cowboy, GSP and others have a "pussified" side to them, and that Till was showing weakness admitting it, most of us applaud his honesty.
But ya, not "every" fighter. Diego Sanchez is being the equivalent of a forum grammar Nazi. He's not technically incorrect.