I think the point is that the RNC has been playing hide-and-seek with their veep selection since she first became public. When Matt says he doesn't know anything about her, I think he means that

1) she stuck to the same talking points, repeating the same sound bits, and generally running around the meat of the questions in Gibson's interview. Even Gibson, notorious for being bipartisanly sweet to politicians, had to repeat questions up to three times because of lack of any substance, before finally giving up and moving on.

2) before those three extremely well-rehearsed interviews, she gave the media basically the exact same speech in every public appearance as she did at the Rep convention.

3) the only things found out about her were forwarded by tabloids and gossip-hungry journalists, greatly decreasing the credibility of the information provided. This was necessary because of the Rep's tight-lipped presentation of Palin.

So for what most Americans know is where she came from, and what's she's NOT. By that I mean, Americans are getting to know her mostly when liberal reporters lambaste her backtracking on any of a number of statements. She has never appeared in an unscripted, completely free interview minus the strictly adhered to talking points; she has never fielded a press conference (without using her RNC speech); she has never presented her OWN point of view in her OWN words. She's basically been running the script McCain's camp has presented her.

Basically, all the cloudy obfuscating on the part of the republican party makes Damon's point relevant: who IS Sarah Palin?

I'm pretty sure that's the point. Creationists believe that God created the world 6,000 years ago. By wondering out loud if she believed dinosaurs were around 4,000 years ago means he is wondering if she is really a die-hard creationist as her opponents would have people believe.