You seem to be operating under the mistaken assumptions than I am dismissing Nginx and that I prefer Apache.
I am not dismissing anything - they are both valid options (depending on the specific needs of their users), but neither of them is my web server of choice.
To be sure, I would accept a move to either in favour of the IIS I currently have to deal with, but given free reign... well, as it happens the one I'd go with appears to have both better performance and a smaller user base than Nginx.