Entirely off base.
OSX is actually way less stable than Win7. I converted completely to mac after running a really quality win7 machine for a while. I hate it.
What you're thinking of is the mistake that was Vista, and the fact that WinXP was the last OS that microsoft did that was good until win7 came out. The advertising that apple did around that is why people think OSX is so much better. It was better than vista, newer than XP - but it pales in comparison (if you ask me) to 7 and 8.
It depends on what you do of course, but a lot of the mac software is really lacking IMHO. Their spreadsheet, word processing, email and presentation software is dogshit - and their cloud implementation is a joke at best.
Microsoft is going deep on cloud, and we'll see how it shapes up. So far, it seems pretty slick - I'm actually going to install Win8 on my mac and give it a try.
OSX is insanely buggy... lots of crashes, odd slowdowns and buggy programs. Sure the mac programs work well, but they have such an insanely limited featureset.
I mean there's a ton that is awesome about mac, and they had a lot of the new mobile/tablet revolution down before anyone else. However, as others catch up, their software is starting to lag... again though, depends on what you do.