Andrew Halcro has an op-ed in the Christian Science Monitor about his experience in debating Sarah Palin:

I should know. I've debated Governor Palin more than two dozen times. And she's a master, not of facts, figures, or insightful policy recommendations, but at the fine art of the nonanswer, the glittering generality. Against such charms there is little Senator Biden, or anyone, can do.

On paper, of course, the debate appears to be a mismatch.

snip

On April 18, 2006, Palin and I sat together in a hotel coffee shop comparing campaign trail notes. As we talked about the debates, Palin made a comment that highlights the phenomenon that Biden is up against.

"Andrew, I watch you at these debates with no notes, no papers, and yet when asked questions, you spout off facts, figures, and policies, and I'm amazed. But then I look out into the audience and I ask myself, 'Does any of this really matter?' " Palin said.

While policy wonks such as Biden might cringe, it seemed to me that Palin was simply vocalizing her strength without realizing it. During the campaign, Palin's knowledge on public policy issues never matured – because it didn't have to. Her ability to fill the debate halls with her presence and her gift of the glittering generality made it possible for her to rely on populism instead of policy.

Palin is a master of the nonanswer. She can turn a 60-second response to a query about her specific solutions to healthcare challenges into a folksy story about how she's met people on the campaign trail who face healthcare challenges. All without uttering a word about her public-policy solutions to healthcare challenges.

So what does that mean for Biden? With shorter question-and-answer times and limited interaction between the two, he should simply ignore Palin in a respectful manner on the stage and answer the questions as though he were alone. Any attempt to flex his public-policy knowledge and show Palin is not ready for prime time will inevitably cast him in the role of the bully.

On the other side of the stage, if Palin is to be successful, she needs to do what she does best: fill the room with her presence and stick to the scripted sound bites.