I won't disclose the actual school, of course, but it was top tier - a school that regularly sees those kinds of scores. At that level, so many people are applying with good scores, I guess they can afford to think pretty much anything they want to narrow down the pool. Also, for all I know, there were some other indications about a poor sense of priorities in the application and this was just one additional factor in the mix. I didn't get the full story of the application, nor did I try to question the person's reasoning - not really a good tactic if you want to keep the contact as a source of info. I just said something like, "Oh, that's interesting" and left it at that.
The one thing I will say, just in general, is that (in my humble opinion, of course) a lot of people do place more importance on the GMAT than they should. And by "than they
should," I mean that they continue to try to improve the GMAT at the expense of other parts of their application. If your essays are poor, it obviously doesn't matter what your GMAT score is. You've got to have the whole package.