“ Collectively, just eight of the 260 organizations accounted for more than half the citations for reporting. These consist of four wire services (two of which concentrate on financial news), two television networks (the BBC and CNN), and two newspapers, The Wall Street Journal and The New York Times, one of which already charges for digital access.”
Nate Silver runs the numbers by looking at citation instances in articles indexed by Google News. (Via NYTimes.com, of course)
Source: The New York Times