Today, Twitter posted their fourth quarter earnings, and have quite a bit to be proud of. With 4479 million in revenue and a $79 Non-GAAP profit, the microblogging social network has nothing to be ashamed of. Versus this time last year, Twitter’s quarterly revenue is up 97%. Still, everyone is down on Twitter, notably because they didn’t grow as expected. With just over 4 million new users in their fourth quarter, Twitter’s quarterly growth was only 1.4%, which is causing some concern on Wall Street.