She admits to "being red meat" for her point of view, "... I am trying to change people's minds ..." she said, and doesn't mind "hitting them in the nose."
His point, that she is only on par with her opponents -- no way, O'Reilly is wrong. Coulter uses fact, had serious points, and has a -real- sense of humor.
Note too, Coulter is responsive to questions and context. In order to be so, she is a good listener.
As for whether her bombast is effective, we'll have to wait and see. I think it is. It enrages the opposition to idiocy, and sets a high standard for "believers" to listen, speak clearly, and rely on facts.
To right-wingers. She's failing to reach half the American political spectrum, all because she gets personal in her attacks.
But that's what sells to her audience: hair-on-fire vitriol.