I think it's important to realize that leaders of these kinds of companies are no different from the leaders of any other company: they need to be upbeat about

I think it's important to realize that leaders of these kinds of companies are no different from the leaders of any other company: they need to be upbeat about the company's prospects to a certain degree. The part that makes them unique is that they can't talk up their business without talking down another part of the economy. I'm not saying that Pichinson's prediction about there being a Social Media fallout is wrong so much as I'm saying that you should take it with a grain of salt. He has financial incentive to talk the Silicon Valley economy down.