rock center with brian williams-end-2012-11-2_20121102005733NBC Nightly News With Brian Williams turned around the demo gap week-to-week to top ABC World News With Diane Sawyer in all key categories last week.  Nightly logged 8.249 million viewers – 647,000 more than ABC (7.602 million) and 1.98 million more than CBS Evening News (6.281 million). In the news demo, Nightly averaged 1.970 million viewers – 38,000 ahead of ABC (1.932 million) and 467,000 ahead of CBS (1.503 million). Season to date, Nightly noted it’s posting its largest total-viewer advantage over ABC since the 2009-10 TV season. (ABC notes its newscast has cut its year-to-year demo margin with NBC by 88%, from 32,000 to 38,000). The NBC newscast has held the top spot in total viewers for 241 consecutive weeks, and in the younger adults 18-49 demo for 298 consecutive weeks.