Sources

Dave Winer u262e: WSJ: Is Twitter Really Worth $10 Billion? http://t.co/3HFVn1hvqU

Tadas Viskanta: Is $TWIT worth 10 billion? Maybe more according to @dkberman. http://t.co/xxuxAfUguy $FB

Justin Wolfers: Comparing Twitter's financials with Google's is delusional. But apparently that's not stopping anyone.nhttp://t.co/NUaYt34iqK

Downtown Josh Brown: Twitter could become the next "money-gusher" a la Google http://t.co/JVD6ruHfcC via @WSJ

Linkfest.com: Is Twitter Really Worth $10 Billion? - http://t.co/v9wuhRhtdl - Wall Street Journal

azeem: Twitter is eating the world: http://t.co/ALXmQGVZcq

Zach Seward: Twitter's net margin is above 30%, @dkberman hears http://t.co/7SAIwEBUdN (Facebook's is 7%; LinkedIn's is 4%.)

Dennis K. Berman: Is Twitter really worth more than $10 billion? The math says yes. http://t.co/pNDXXipnxQ #twitter $FB