I don't consider this to be especially spoilery but maybe it is to some people so the details go behind a cut just to be safe =D
I would be so happy if someone remembered that interview and where I can find it!
I heard that David Shore said in a summer (2010) interview that Cynthia Watros had a contract for at least 5 episodes in season 7.
I'm interested in the exact wording, but sadly I can't seem to find that interview anywhere. DX
I've no additional information, I don't know if it was a video interview or something else.
If anyone finds said interview I would thank you forever!