Absolutely. Measurements like that are meaningless in light of the ubiquity of MS-Windows.
The point of the article is valid though, in that you're seeing a lot more companies that were leery of Linux becoming adopters, starting with back-end processing. At my company, they are investing heavily in Linux, and interestingly enough, it's largely on the MS side of the house. They are using VMWare and running multiple instances of Windows on them for those services that are currently residing on single-tasked boxes. Linux runs directly on the hardware, then MS-Windows runs above it. It makes management of MS-Windows much easier.
We'll be doing essentially the same thing on the Unix side of the house when we start a big datacenter move in a couple of months.
What varietty of Linux is running?