This is not a fair comparison. In general, Mac users are more intelligent than PC users. That's why the Macs require less management and help from the sys admins.
Oh this is rich. Although I would've agreed with your statement several years ago, now it's clear that the mac fits more naturally with a human mind than a lousy pc. So basically has nothing to do with user's IQ level, but it has everything to do with Designer's effort to put some effort.
The individuals that discovered the mac and switched over, typically simply realized that they're more efficient and have less troubles doing their job on a mac than on windows. I'm the perfect example in this case: back in 2009-2010 the director of acquisitions at the company i was working for tempted me with mac bought by the company. I returned it after one week-end spent with it, for the wrong reasons. Fast forward to 2014: I realized that trying to my job on windows station it was so time consuming (small operations that put together were absolutely tedious) and add to that the maintenance I'd have to put on it. So I migrated to Ubuntu: maintenance was even worse (updates, keep an eye on new, more compatible packages etc), the work flux has been easier but still not good. So, what the hell, I grabbed my wife's old late 2011 macbook pro, stuffed in it 16GB of RAM and a 128GB ssd and by golly, heavens opened in front of me: 90% maintenance, 10 times more efficient, no registry maintenance, no updates every single ****ing week, no exclamation marks why the **** citrix crap continues to not work properly (good luck trying to make citrix work properly on ubuntu).
Let me reiterate the positive sides: office for mac 2016 looks very good and acts accordingly; ssh tunneling works out of the box; python development is made a breeze by pycharm; iterm2 is as good as one can wish; 1password makes it a breeze to deal with passwords (after wasting my time for 3 years with ****ing laspass; made the switch furiously when lastpass put out their stupid mac application); safari, while not 100% reliable, makes for a very good browser that supports well trackpad's gestures and goes easy on the battery (for some reliable heavy lifting - firefox, chrome for 100 opened tabs and OmegaSwitch proxy switcher); and many many more positive sides I won't feel the servers with.
So you see, in the end, it's not the intelligence that made me switch (although I don't suffer from shortage of it) but it's the realization that I'm a mere mortal and I only have 50 more years to live from hereon. Mac helps me make them count.