I think that's broadly true. Windows (as an OS) has been pretty reliable ever since XP came along (even Vista wasn't
that bad) and Windows 7 is really a very good OS indeed. However, Windows' Achilles heel has always been its susceptibility to viruses and other malware. The other reported problems (DLL Hell etc) were largely confined to history as far back as Windows 98 although many would have you believe that dodgy drivers and DLL Hell are still ongoing problems for Windows users (which they aren't).
The Mac's great strength is the consistency of its applications which, in turn, leads to a not-too-steep learning curve. And its also great that most of what you need is there right out of the box. Unless you want really top notch software, you can survive with what you get from the OS install disks. That's very different from the situation with Windows where you can't get very far at all without adding 3rd party products.
But one thing I've learned about computing is that the majority of computer users view their favoured OS through rose-tinted glasses. Even Linux users think it's the bees knees - whereas I find using Linux a bit like travelling back in time to the 1980's. It's like computing used to be around 25 years ago!
Which all goes to prove that there's no accounting for taste..!