[ShawTaylor]

"That MS has 31% of the market means that 69% of the market is using something else. That pretty much supports my view, at least from what I can see. 2/3rds of all Internet servers are not using Windows"

Nope.
That MS IIS had 20.5% share a year ago, and today MS IIS has 31.0%, means MS market share is up by 50"%, and the lead of lead of Apache over Windows/IIS has gone down sharply from 47.5% a year ago, to 27.7% today.
That essentially puts the lie to your asssertion that "In the web hosting and colocation markets, Linux and to a lesser extent, FreeBSD have already won".
Linux/BSD/Apache are losing market share every month. There is no 'already won" about it.

[ikka]

Go to the site you linked. Look at the chart marked "Market Share for Top Servers Across All Domains August 1995 - February 2007" -the second large chart on the page.

You will see that Microsoft's IIS actually *peaked* in 2002, either February or May 2002, when their market share was higher than 31%. Over the next four years of that chart, you will see that IIS lost market share while Apache gained.

That IIS has, over almost 5 years of marketing, new development, more marketing, and the release of new functionality (new versions of .NET etc) not quite regained even its prior, not-very-strong position, is undeniable.

Phrase it however you want, but using even your own stats they are far behind. Note too that www.google.com and www.mypetdogwallace.com , in Netcraft's stats, each get a vote, in spite of Google serving billions of pages and the other site serving only a few.

EVERY single large web site aside from MS, from eBay to Google to Yahoo, does not use IIS to serve their sites.