Does Bing run on Windows?

I wondered if Bing was run on Windows servers (that would have been an excellent demo of Windows Server). But checking on NetCraft seems to indicate that is hosted on Akamai‘s servers and Akamai probably uses Linux based hardware and software. I guess it makes sense that a company with lots of money would spend that money to not have to bother with the scalability aspect themselves :-). But hosting on a Windows back-end would have been a great demo.