Yeah, pretty much. There are people who intelligently argue against it. Sir Bahamut's analysis linked to above is very well thought out, even though I remember disagreeing with him over it. It tends, I think, to be people who act most hostile towards the theory that have the weakest arguments against it.

I never really understood the hostility. It isn't like R=U threads aren't clearly marked. They're pretty damn easy to avoid if you don't like them.