I'm not at all surprised by this reaction. It's the same reaction that's to be had from anyone whose livelihood is linked to Windows.
From the article: "Preston Gralla is a well-known technology expert, and the author of Windows XP Hacks as well as nearly 30 other books. He is also the editor of WindowsDevCenter.com "
I have no doubt that I can demonstrate to you that the sky is orange, as well. All that's required is that I disregard all evidence pointing to the conclusion that the sky is blue.