That means someone in the room when the GJ met--if not GJ members, then the baliff or court stenographer, or even the Judge or Special Prosecutor. The lawyers are not allowed in, so if it is them talking out of school, they aren't doing it from direct knowledge. And given how the press has been screwed by the WH, I doubt they are taking the word of any administration types, or legal eagles for the indicted, or soon-to-be indicted, as Gospel anymore. This had to be confirmed either by someone on the SP staff or within the GJ room.
Every news outlet, from TIME to Newsweek to NYT to LA TIMES to the WAPO and the Moonie Times, are all saying that when the Special Prosecutor said "Official A" he was talking about Rove.
That does not, of course, preclude the possibility that there is an Official B, an Official C, or an Official D...
http://cbs5.com/topstories/local_story_302135510.html...Three people close to the investigation, all asking anonymity because of grand jury secrecy, identified Karl Rove as "Official A." The White House deputy chief of staff, who also talked with Novak about Plame, has acknowledged talking to reporters about Plame....
http://www.realcities.com/mld/krwashington/13025366.htm"Official A is either Rove or Billy the Kid," Flannery said. "The prosecutor has decided that he can't close the loop on Rove quite yet."