The camera behind Palin's podium just caught her furiously (but discreetly) shuffling papers as Gwin Ifill was asking her question; and Palin took at least one glance down midway. Something to keep an eye on over the next 90 minutes.
I doubt Biden has very many.
Update: Biden's glancing down, too, but for quotes and statistics; seemed to me that Palin was looking for talking points. Big difference.