This seems to hold up with my and others experiences. I have known people with very few problems and some with massive problems with their Windows PCs. It is also about as long as it takes to reboot, relaunch the browser, email, word processor and whatever productivity applications you need and get everything back the way it was. And this completely discounts the ~15 minutes it takes to get back into flow, though given the number of interruptions most people experience then you were never in it in the first place.
Losing fourteen minutes on average everyday is a massive waste of time, money and productivity. Using the concept of compounding interest you can parlay this into massive increases in personal productivity.
If you want to be 1000% more productive in 10 years, then you only need to be 30 seconds more productive every day. Taking back those 14 minutes will make you 28000% more productive in 10 years. This is ideal but I know I lose a lot less time on my Mac then on m PC. I reboot my Mac about every other week or two and that is mainly for maintenance with some download or other from Apple.
I have always felt more productive on my Mac, but this puts it in perspective.