it's been a bit since I listened to this, but I remember her voice having a midwest quality to it, like Kathleen Madigan's voice ... I love KM.
I heard once that the Northern English accent, like from Sheffield or Yorkshire, will sometimes carry a connotation of common sense, like for a TV character or something. I have no idea if this is accurate, but I can kinda see it. I think the same might be true for our Midwest accents.
On the other hand, both Northern English types and Midwest types are also seen as sort of backwards too, so I guess that's the good and the bad you get with the cultural stereotyping.