What platform and software stack is Bing running on?
bing
Solution
Mystery solved - one one of the top 5 sites on the planet runs on MVC/IIS.
ScottGu confirmed it during the keynote last week at MvcConf:
http://channel9.msdn.com/Series/mvcConf/mvcConf-2011-Scott-Guthrie-Keynote
Problem
What's the famous Bing running on? Asp.net, asp.net mvc, IIS 7, .net 3.5? Using firebug, I thought I could tell what was powering Bing since I had noticed the speed difference between that and Live.com. But, unfortunately, looking at the HTTP headers in firebug yield no server side information. So, what do you think.