It's funny that he mentions Google as an example of a company that gets the paradigm, but most of Google is C++ and Java. C# has better functional paradigm support than both of those.
I just built a search engine. I was able to make it massively parallel with some trivial parallel linq code. The power of Linq and the parallel extensions is just amazing.
http://infolab.stanford.edu/~backrub/google.html
Both the URLserver and the crawlers are implemented in Python.