A bit off subject...I saw Kathy Griffin do her stand-up act in Chicago recently. Her act is basically, her sarcastically making fun of celebreties and dishing gossip and either starting or fueling rumours.
If you recall the charecter she played on 'Seinfeld', a sarcastic comic who's entire act was ripping on Jerry, that is pretty much what her real life act is like too. Except she dishes on LOTS of celebs and not just one.
So, that is basically her schpeal. She is basically just sarcastic and likes to cut on people. Including herself. She did a whole bit on her "cosmetic enhancements". But she is very, very funny.
So whether or not she really feels that way about David, it is her normal schtick to just go to cutting and his lack of 'book lernin' is the easiest target to aim for.
I am sure David shouldnt take it too personally.