Twitter grew 133 percent last month. 20 mil worldwide? by Brian Blum in Uncategorized 17 Apr 2009 We all know that Twitter is growing rapidly. But the latest ComScore numbers surprised even us. Traffic to the micro-blogging company’s site jumped 133 percent from February to March, putting it at 9.3 million visitors in the U.S. By comparison, the January to February increase was 55 percent, and from December to January, it was “only” 33 percent. In Fe This article is only available to AIM Group clients. Please subscribe now or log in to view. Share comscoreStrategyTwitter Brian Blum Brian Blum covers the U.S., Canada and Israel for Classified Intelligence Report, and contributes to our special reports and research projects. Originally from San Francisco and now based in Jerusalem, he has been with the AIM Group since 2004. He is the president of Blum Interactive Media, specializing in writing and multimedia content development for online, print, video and audio. His clients include newspapers, universities and non-profits. He is currently working on a book about the billion-dollar bankruptcy of a once high-flying Israeli startup.