Actually, the majority of Mac-users I know, also work/use Window machines. So, in general, the mac users tend to realize the strengths/weaknesses of both platforms. A friend of mine teaches at a small college, and is the head of the tech/computer department. From her experience, the MS-zealots are the worst. Since MS covers all the bases. (consumerOS, serverOS, various software, etc.) many MS lovers have little knowledge of other platforms. It is pretty impossible for a Mac/linux/sun lover to be the same way.
And, I have found that the worst Apple zealots, are those that the Apple-bashers tell others about. I have really yet to see one as bad as the stories.
Oh, and I also know some pretty damn knowledgable Mac-users.