I found an interesting article on the IEEE Spectrum magazine dated this June 2011. It is hard to make a comparison between Facebook and Google.
|Usage||1 billion search requests each day||600 million active users (25 minutes)|
|Localization||40 languages||76 languages|
|Average Employee Age||30||31|
|Number of employee||30 000 employees||2 000 employees|
|Number of patents||620 U.S. patents||8 U.S. patents|
|Market Valuations (Q1 2011) US$||$175 billion||$65 billion|