"
In the web hosting and colocation markets, Linux and to a lesser extent, FreeBSD have already won"
Windows keeps gaining market share in the web hosting market:
"Microsoft-IIS gain 935K sites, continuing an advance that has seen Microsoft steadily chip away at what once seemed an insurmountable lead for Apache. In our Feb. 2006 survey, Apache held 68% market share, giving it lead of 47.5% over Windows (20.5% share). In this month's survey, Microsoft's share has improved to 31.0%, narrowing Apache's advantage to 27.7%."
http://news.netcraft.com/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.