All the times I've seen her speaking as a talking head... she 'acts' as if some archivist is recording her every utterance. Her eyes seem to search-the-ceiling for just the right word. It's almost as if she thinks she's doing theater.
In short, the problem with Peggy is that she's too full of... Peggy.
Not to be catty, but I think she once inadvertently disclosed her reason for looking up: a tauter jawline. Really.