Sen. Feinstein has only taken about two years to say aloud that the CIA was spying on the Senate and that it is a Constitutional matter (while the torture they were both supposedly examining is perfectly okay). Truly, she is making a devastating charge. It's just that it is
she who is making it, and that translates to a very low credibility rating.
The intelligence agencies as a group are at least as expert in providing useless un-information. Read this if you have any doubts:
http://www.emptywheel.net/2014/03/11/john-brennan-trolls-emptywheel-even-before-he-prevaricates-in-response-to-dianne-feinstein/