Did she always speak that way or was it because she was on TV and reading a prepared text? According to my mother, she sounded like a shrew. My mother took a serious dislike to her from what she told me years ago, which was of course years after the fact.
You were probably too young or maybe not even born when she gave the WH tour. I'll bet you could find it somewhere and she what I am talking about. She sounded beyond dumb.