According to the NYTimes:
“”Google doesn’t have anything magic here,” Bill Gates, the Microsoft chairman, said in an interview. “We spend a little bit more per machine. But to do the same tasks, we have less machines.”
The NYTimes article discusses Google’s infrastructure, and the operating efficiencies that help create competitive advantage.
The article doesn’t really shed any new light of Googles infrastructure, except for this bit:
“Beyond servers, there are signs that Google is now designing its own microchips. The company has hired many of the engineers responsible for the Digital Equipment Corporation’s well-regarded Alpha chip. Google’s next step is to build high-performance silicon,” said Mark Stahlman, an independent technology analyst”.