My observation is that users who have CHOSEN the Mac are generally much more knowledgeable about their Macs than Windows users are about theirs and that, in fact, they are more knowledgeable about both Macs and Windows computers than Windows users are. That does not apply to users who did not have the choice. There I find there is not much difference between Mac and Windows users... both are users who just want to do their jobs and go home and have little technical expertise on either platform.
Certainly true of my daughter for instance, but the department I support are diehard Mac users.