Steven J. Vaughan-Nichols is a big Linux zealot and a writer for Linux Watch. I could not believe his last article where he acknowledges the .NET stack is superior to a LAMP stack mainly because the optimizations resulting from integration of multiple components from a single vendor
Basically he is accepting the fact that a centrally planned architecure from a single vendor is better than a community-created platform where multiple individuals contribute pieces of the stack.
The conclusions come from an extensive set of tests done by eWeek, which you probably have seen by now. Take a look at Steven's column here: http://www.eweek.com/article2/0,1895,1986774,00.asp