WhatsApp will bring Facebook another billion users. We will be a billion-user product. Whether there is a direct valuation or an indirect valuation, there is value, and Facebook understands that well.
We're the most atypical Silicon Valley company you'll come across. We were founded by thirty something; we focused on business sustainability and revenue rather than getting big fast, we've been incognito almost all the time, we're mobile first, and we're global first.
Yes, I was a big math and computer geek, that's true. I was driven by the scholastic side of things. For me, it was all about what I could do with math and computers.
There's a certain degree of speculation that goes into valuations. In so far as the market supports a valuation, everyone who gets a great one deserves it, but they should also be cautious because that speculation is temporary. I saw Yahoo go from $100 billion to $10 billion. It's not a long-term measure.