“Studying only active sites, the changes in market share are reversed: Apache grew by 0.23 to 55.66%, while Microsoft fell by 0.83 to 11.53%. Within the million busiest sites, nginx was the only major developer to increase its market share, which now stands at 12.22%.”
This is another reminder that where price/performance matters, FLOSS wins. That other OS and its “partners” just are not competitive. There are now two FLOSS web servers ahead of IIS, Apache and Nginx. IIS is sinking into the weeds where it belongs. I expect that 2012 was the year when that began to happen for their desktop OS as well. 2013 will tell the tale.