Well, not actually Twitter and Facebook, but “digital networks” of which I say is the same thing:
“MIT research shows that 40% of creative teams productivity is directly explained by the amount of communication they have with others to discover, gather, and internalize information. In other MIT studies research shows that employees with the most extensive digital networks are 7% more productive than their colleagues.” MIT Professor Sandy Pentland, Harvard Business Review, February 2009
Tags: productivity, social networks

Nice. Agree on all points!