According to Barry Schwartz, Search Engine Land’s News Editor, Twitter’s Traffic is up nine percent from December to January. Using information from VentureBeat, ComScore, and Experian Hitwise, he attributes this to be due to Google adding real-time results to their search interface in December.
 
“It [has] had a major impact on people discovering Tweets in the search results,” Schwartz says. “Google will show real time results from Twitter and other sites based on if that is a trending (hot) query.”
 

  http://searchengineland.com/twitters-traffic-up-9-thanks-to-google-36509