Read this article from Comscore.

“Twitter seems to be just about everywhere these days, infiltrating pop culture and challenging traditional communication channels as people answer the simple Twitter question, “What are you doing?” Many people have hopped on the Twitter bandwagon – from businesses to celebrities to professional sports players to President Obama.

Over the past several months, we at comScore have watched how quickly traffic to Twitter has exploded. Worldwide visitors to Twitter approached 10 million in February, up an impressive 700+% vs. year ago. The past two months alone have seen worldwide visitors climb more than 5 million visitors. U.S. traffic growth has been just as dramatic, with Twitter reaching 4 million visitors in February, up more than 1,000% from a year ago.”