They did agree that the first 10 minutes were painful, but I think that's a combination of the fact that it's not what you were expecting and the fact that the first 10 minutes of the movie were awkwardly shot and acted ("DRAAAAAGOOOON!"), which the burring effect of the lower framerate helps to disguise.
Sure, I believe that some people probably didn't like it as much. Different strokes for different folks and all that. But I can't help but feel like there is something of an "old guard" effect at work here, where people fetishize the incidental details of something they're heavily involved in, and those people are responsible for a lot of the noise.