A new Gallup Panel poll measures the favorable and unfavorable ratings for America's top television news and talk personalities.

Diane Sawyer "has the highest overall net favorable," with 80 percent favorable and just 11 percent unfavorable. (Net favorable is the favorable rating minus the unfavorable rating.) Charles Gibson, Matt Lauer, Dan Rather, Bob Schieffer, and Brian Williams all have pretty high net favorables.

However, 27 percent of those polled had never heard of Gibson; 29 percent had never heard of Schieffer; and 38 percent had never heard of Williams. (Wow.) Here's a table listing re-calculated favorable and unfavorable ratings, "looking only at the responses of those who have an opinion of each television personality:"

Opinion of Television Personalities Among Those With Opinions of Each Person July 24-27, 2006
	Favorable	Unfavorable
	%	%
Diane Sawyer	88	12
Charles Gibson	87	13
Brian Williams	87	13
Bob Schieffer	85	15
Anderson Cooper	83	17
Meredith Vieira	81	19
Matt Lauer	81	19
Lou Dobbs	78	22
Regis Philbin	75	25
Dan Rather	73	27
Katie Couric	72	28
Barbara Walters	70	30
Larry King	66	34
Bill O'Reilly	56	44
Geraldo Rivera	37	63
Rosie O'Donnell	35	65
Star Jones Reynolds	30	70