And I'm going to go against the grain on one point. I think it was more emphatic, if you will, in her NOT asking follow-ups.
It made her look more "removed" or "unphased" of having hit him with straight-forward, crisp questions.
I actually think that it bugged Biden more that she didn't follow up. It actually removed any label on her of being "combative," (as Biden so falsely claimed.)
And it made him look like "sure, sure, Joe...anything you say, Joe. Okie-dokie."
I liked her style...perfectly.