Tumblr Has 700,000 Visitors Per Employee – Way More Than Twitter, Facebook, Or Google | cross pond high tech | Scoop.it
From e.businessinsider.com - January 19, 2013 2:36 AM

"According to Comscore, it had almost 100 million worldwide visitors in December. What's particularly impressive about that huge number is that Tumblr only has 145 employees."