mms://wm.microsoft.com/ms/windowsserver/compare/BreakVideo.wmv

As a popular entertainment site with an advertising-based revenue model, Break.com must support high traffic volumes while enticing Web site visitors to spend time on the site. The company handles up to 35 million page views per day with only two Web server computers.

"That's the thing that I don't think a lot of people on the LAMP stack realize. [...] I think you'll find that Microsoft technologies compare very well individually. But that misses the big picture: Microsoft has created a platform that simply lets me architect and build applications in a way that I can't on LAMP.”

Nick Wilson, CTO, Break.com 

Windows Server comparison Q&A for microsoft.com
http://www.microsoft.com/windowsserver/compare/interviewdetails.mspx?recid=23

Case study on .NET, Windows Server, SQL and Silverlight
http://www.microsoft.com/casestudies/casestudy.aspx?casestudyid=4000002034