RussP, there are a lot of references on the Web about this (not just somebody saying it), but here's a short one from those who should know :
http://kerfuffles.blogsome.com/2005/10/25/langleys-war-plan/
Also, if she were a NOC, Fitz wouldn't go to the lengths he went to hide that, even from the judge, apparently, to justify his "investigation". He always referred to her as "classified", not "covert" which is specific to the statute, and we know that she had a desk job as "analyst" at CPD in CIA, she also married Joe Wilson in 1998 and had twins - hardly leading a life of jet-setter. There were also no other "covers" disclosed, other than "non-cover" at Brewster-Jennings, which I posted about in #37.
Here is an interesting quote from your link:
"A former CIA covert agent who supervised Mrs. Plame early in her career yesterday took issue with her identification as an “undercover agent,” saying that she worked for more than five years at the agency’s headquarters in Langley and that most of her neighbors and friends knew that she was a CIA employee."
Unfortunately, but I don't see any attribution or reference. Where did this come from?