More paranoia: Why Would Any Virus/Worm Just Attack W2k??

John Dvorak makes a bizarre little post on the Zotob worm:

This worm seems like a good way to get people to get off of the W2K teat. W2K is the last MS-OS that could be transferred easily from machine to machine. And still one of the best most reliable OS’s.

Erm… why would any worm target that vulnerability? Because it’s a known vulnerability, Microsoft only just patched it, and so quite a few idiot sysadmins won’t have done the patch yet?