It's scuttlebutt. It could be accurate, but the only people saying so are those who have simply asserted it (Fitz) but refused adamently to provide evidence thereof. Why? Name a motive for keeping this "fact" secret? She's long ago been "outed" by Novak and Armitage. Who's being protected? Why?
what "fact"? she wasn't covert, that's the fact. is she was covert, someone would have been charged with revealing that. Fitz can't provide evidence that she was covert, because she wasn't. He didn't need to anyway, the GJ was simply a perjury trap for Rove and Libby, it had nothing to do with determining whether a "covert" agent was outed.