I actually speak that way sometimes. I had a lisp as a child (did speech therapy) and now my MS sometimes makes it hard to speak clearly so I tend to enunciate as clear as possible especially when I'm speaking in public. It might look like I'm overdoing it to some people, but that's how I speak. I've only watched her leave in video, but I know what you mean.
I know you're talking about KT, but it a sensitive subject for me sometimes.