Those results are nothing more than a fluke. Even if CBS does put Katie on the evening news, it would be stiff competition. Elizabeth Vargas is expecting on Lord knows when and Bob Woodruff is recuperating without a definite day of when he comes back (there's always ABC News back-up anchors), but that's beside the point. Bob Schieffer would've succeeded Cronkite sooner, way less of Dan Rather. He has always kept his cool and never loses steam. But the nightly news figures where CBS beats ABC is a fluke. Now putting Katie Couric in the drivers seat at CBS News, that's a whole 'nother topic.