Exactly! Who else did these CIA employees tell that "Wilson's wife" sent him. If she was so covert or classified, who gave them authorization to give her identity away?
Ding ding ding.
There is actually a bit of truth in this article if you read enough into it.
Grenier either:
(A) outed Plame and blew her cover to Libby, or,
(B) Plame wasn't a NOC and wasn't covert, which is why Grenier was forthcoming to Libby.
This is actually a plus for Libby, and Fitzy knows it. That's why he leaked this upcoming testimony.