I think there's enough evidence to call it proven. Graham has been taking crap for keeping that diary for decades. It's nice for it to finally come in handy:
Graham told Greg Sargent this afternoon: "I do not have any recollection of being briefed on waterboarding or other forms of extraordinary interrogation techniques, or Abu Zubaydah being subjected to them."
Greg adds that Graham denied being told about EITs, and argued that the presence of two staff members at the meeting (as indicated in the records) would have made it "highly unusual" for the briefers to divulge such sensitive info. "I don't recall having had one of those kinds of briefings with staff present," he said. "That would defeat the purpose of keeping a tight hold" on the info.
The pattern is established, I think.