I don't place much faith in that article, however Palin has proven that given the chance, she will fuck up any interview she is doing.
She simply does not possess the mental fortitude to do anything other than spout off canned answers. A canned answer is good for one question, but when you use the same one with no variation in it for 5-6 questions, it's a problem.
The only way she is going to win that debate and any votes is if she goes on there and her water breaks or something. So she gets medically excused.