Icaza has a point.
A couple of years ago, one of my hardcore Linux friends switched back to Windows for the same reasons: hacking around for WiFi, graphics card, sound, and well that mucking with Office files with OpenOffice will fuck up the format.
And then, I had the same issue this December; I needed a work lap, but also MS Office, OmniGraffle, Merlin and those are Win/Mac or Mac only. Of course, I went for Mac as any other lap would pay the MS tax which I didn't want to do.
I do acknowledge that Linux has been user-friendly for quite some time, and even user-install-friendly as of late, with WiFi finally being supported out of the box. But it still gets hobbled by stupidity, like "no mp3 playback" and Adobe has recently stated they're no longer going to upgrade the Linux Flash plugin. I've demoted Linux to VM status on my Mac, though my main PC at home still has Linux and does a lot of the geeky stuff I want it to do. But as a desktop OS? Maybe, if I were to work in a 100% Linux shop. And even in some of those, I've seen people have windows as a VM...
Oh, and the irony: Miguel de Icaza was the Mexican champion on IT circles. A lot of Mexicans started doing Linux just because a prominent Mexican had got into the international limelight, and he was doing some stuff for Linux...