Apple just built a 13000 employee headquarters in Cupertino. they're calling it the spaceship. Doesn't look like any downtown I've ever seen. Facebook Runs shuttles that take an hour to get from San Francisco to Menlo Park where Facebook is located.

And lets not forget the techies being priced out of downtowns.
http://www.bloomberg.com/news/articl...or-1-3-million