I recommend that you sit behind a non-technical relative or friend, and watch them use a Mac
without offering them any help.There are quite a number of things that they'd like to do that isn't clearly expressed - or even easily findable! - though OSX's GUI. They will struggle with it for a bit.
--
Really, it's just a learning curve and it's the same for any new OS.
Most non-technical people don't have the habit of figuring out what to do. They have the habit of doing what they're used to. For most, if you change even the smallest thing in their interface it can be catastrophic. (My mom often calls me for things like not being able to use internet at all anymore because the bookmarks bar is gone because someone accidentally hit ctrl+b or something).
I think the whole "Apple just works" thing is majorly overblown. Every time I have to use an OSX laptop I cringe because I have to look for stuff in the weirdest places and it takes me so long to figure out how to do things that I often just give up (if I'm using an OSX laptop it's usually because I don't have much time and just bummed the first laptop that was around). I can't imagine my mom magically finding everything intuitively if I can''t.
Also, you say you backed your assertion up with evidence. What evidence? I see none at all. The plural of anecdote is not data. (I'm not saying I'm providing evidence either, I'm simply providing a counter-example to your anecdote.)