" People were indeed comfortable with sharing, Zuckerberg told him. A third of his users, he said, share their cell-phone numbers on their profile page. “That’s evidence that they trust us.” Graham was startled at how emotionless and hesitant this kid was. At times, before he’d answer a question—even something that he must have been asked thousands of times, like what percentage of Harvard kids were on Thefacebook—he would fall silent, staring into the ether for thirty seconds or so. Does he not understand the question? Graham wondered. Did I offend him? Nonetheless, before the meeting was over, Graham became convinced that Thefacebook was the best business idea he’d heard in years, and told Zuckerberg and Parker that if they wanted an investor who was not a VC, the Post would be interested. "

― Steven Levy , Facebook: The Inside Story