Obviously I wouldn't really know what she was like, but she certainly comes across that way to me.
I wouldn't assume that she gave Kimel a reason for leaving, otherwise why wouldn't she or give the explanation? I've seen plenty of talkshow appearances cut short, but they always give a reason why they will be leaving, either the host or guest themself will mention the reason.
I've seen her carry on in an interview how ugly and homely she was growing up, like she was the ugly duckling that turned into a swan, which is so lame. They've have shown pics of her when she was younger, and she was nowhere near ugly. To me that seems very pretentious.