Grasp at straws much?
Look at the graph. It's pretty obvious that OS X and iOS devices sold right at what Windows 7 desktop and Windows 8.x desktop/mobile(the equivalent of OS X + iOS) sold for the quarter. And if you look at the trend you will see it's been going away from Windows for a while.
Windows had a sizable lead, and they've lost it. They're neck and neck with Apple, and getting creamed every day in real time. And it's only getting worse for MS. That's the point you should take from this article.
Gist of the story: Given a choice, more people pick Apple than MS. Pretty simple math.
You can now go back to using IE, Paint, Windows Media Player and 3.7GB of your memory...
Take iOS devices out along with the small amount of Windows phone sales and compare Mac sales to Windows pc sales.