Dear god yes. I work with a lot of scientists and doctors and they assume everyone else has the IQ of a prune. When they notice that I'm smart, there's the shock, and then the highest invitation in the land: to become a scientist or doctor. One guy, a med-school faculty doc, was delightfully bald about it: I helped him out at a computing center, and he did the shock thing, and actually said, "You're smart." "Yes," I said. "You know, you could be a doctor. Have you ever considered medical school?" "I'm too smart for that, I've seen how you guys live," I said, and he laughed and said, "You're probably right."
The scientists, though...it's sad, they're so rank-obsessed. If I'm talking to a scientist friend at another university or journal, and I say something bright, they're delighted that someone outside science understands science so well. If I say it in my department, where I'm hired help and not supposed to have much of a brain, they react like I'm a trained dog, and eventually become uneasy. They've got nothing to worry about, of course, they're tenured. But maybe they figure I'll eventually be able to see what crummy science many of them do. (Hint: I already do.)