I can't believe people actually study twitter for a living. That's like deconstructing a hallmark card. But whatever:
July 5, 2013 — News agencies continue to have an edge over Twitter in being first with the news, a study found.
Research into reporting of news events by Twitter and newswire services has found that while Twitter can sometimes break news before newswires, for major events there is little evidence that it can replace traditional news outlets.
Twitter's main benefits for news are bringing additional coverage of events, and for sharing news items of interest to niche audiences or with a short lifespan, such as local sports results.
Doesn't look the paper behind this news release is available yet.