Ok, so do new people over on Greedbay know how to change "Best Match" either. Just as valid an argument but I don't see them changing it because someone doesn't like it. Switching isn't difficult, the type of user that doesn't bother to check out how a site works probably doesn't bother to read your terms and conditions either, so what do you suggest is done about that, force them to sign a disclaimer that they read everything!
It's only a trial, just lets have a little perspective on it, as Michael Winner would say "Don't Panic Dear"