Maybe. I actually make it a general principle that when I'm talking to someone, I take as given that their professed beliefs are basically right; I know what I believe in the background, so that I can try to lead them toward that, but I basically try to speak in their terms. I don't really evaluate all that much whether I actually believe what they're saying. For purposes of talking to you, I assume that you are what you say you are; privately, I might have my own doubts, but the actual credence only ever comes up in certain decision-theoretic situations.

(Average on what attribute, among what group? Surely I don't have below-mean intelligence for a currently-alive human.)