Polemics in the service of Truth can still be annoying, perhaps, but never worthy of condemnation, IMO.
Your's is the first truly interesting reply I've received on this subject, and the only one that will make me stop and think it through.
Like any tool, polemical speech is neither good nor bad in and of itself. I agree with much of Coulter's underlying premise regarding the "Jersey girls," although we on the right use our own human symbols in precisely the same way as the Left uses them, Sheehan and their ilk. I also understand Coulter uses the language she does in order to draw the kind of attention her remarks about them engendered.
Nevertheless, I have been repulsed by her acidic manner for a very long time. As mentioned earlier, I much prefer the style of someone like Rush Limbaugh to Coulter's style.