I don't know about that. This is all anecdotal, but I know quite a few non-geeky types in real life who disliked Man of Steel. In fact, the only person I know who liked the film is a hardcore comic book geek.
The metrics that measure audience response are broad and not fully satisfying, but they beat anecdotal evidence by a long shot, and they indicate that the general audience mostly liked Man of Steel
, certainly more than critics did.