I can see why you would think she is, I see it too. I don't quite believe it. I can't really say why exactly. What I mean is, I can't specifically say "She isn't a YB because she doesn't have this."
It's more of a kind of overall, almost but not quite feeling ? That sounds really stupid doesn't it?
If it turns out she is that's fantastic, but I would not treat her as one. Consider it a bonus if her YB proves out for you.
Gale