Disclaimer: I'm 34 and prefer Mac OS X, work on an iMac + 34" second monitor and also run full-Windows 10 via boot camp.
This is what's called a biased survey from a statistical perspective. When you put up a possible answer that says "Uses PC but prefers Mac" but not a corresponding "Uses Mac but prefers PC", the only reason you would leave out reciprocal potential answers is if you were seeking a specific result in your study. Also, no details are provided on the type of college students polled. Are these freshmen, seniors, grad students? I suspect a poll of undergrad vs. graduate students, conducted in Puget Sound vs. Cupertino vs. Nationwide would all produce very different outcomes. Were any gamers polled, or were they all playing Fortnite in their dorms on their PCs? My fundamental issue with this type of survey though is cost bias. If you really had to, you could buy a new PC for under $300 in any Walmart/Target, but the cheapest new Mac Apple sells that I could find is a refurbished MacBook Air non-retina (with a military discount) for $764. Most new MacBooks cost over $1200, so are people really voting for OS X, or are they voting based on their comparison of a $3,000 15.4" MacBook Pro 6-core Retina Radeon Pro Vega system vs. a garbage 1440x900 $500 HP running Windows 10 Home edition full of bloatware they sampled at a Best Buy?
"Data, when tortured long enough, will admit to anything."
Personally, I like both operating systems a lot right now, but I give the edge currently to Apple. That wasn't always true, it seemed like for 25 years one of them was always broken, or slow, or lacking features. When Apple admitted defeat on keyboard shortcuts crucial to system level and implemented MS Office commands they actually catapulted ahead of Microsoft for me personally, because I like the efficiency of the Command button being closer to the center of the keyboards than "Control" on a typical Windows keyboard. (Random: Yes, I know this can be swapped with a macro or settings alteration; I'm just commenting on the default settings.)
Apple's ecosystem/handoff, iTunes, keyboard shortcuts, superior App Store, quality hardware (not counting KeyboardGate), the ability to run a full copy of Windows via boot camp and customer service are all relevant for me at the moment. Apple is also one of the only tech conglomerates that actually cares about my data and personal privacy, and that is a big deal for me. I think the data harvesting via Facebook and Google abuse honestly creep out Tim Cook.
However, if someone else plays a ton of cutting-edge games instead of casual X-Com and KOTOR like me, does a lot of coding, relies on MS Office, prefers more options, Adobe's suites or AutoCAD, prefers faster answers to their queries more than privacy, likes Alexa/Cortana, or does web development or Access database queries with different programming languages, they likely prefer PCs.
I'm just glad both of them continue to improve. For a long time, the standard was... Work is 100x easier on a PC, Fun/Casual/User Experience/Media browsing is 100x more satisfying on a Mac. Today, you can do almost anything on either platform. Now if I could just get a decent sized MacBook with 12+ hours of battery life, 4+ cores, LTE-Advanced/5G, WiFi 6 (Wireless 802.11 ax), Touch ID but optional NO Touch Bar, maybe an SD or microSD slot and no keyboard issues that could run MS Access, costs less than $3,000 and doesn't start shaving aluminum every time I glance at it, things would be perfect for the next 7-10 years
