From Variety.com: "At 9 p.m., “Grey’s” pulled an 18-49 rating that was 43% higher than CBS’ “CSI” (3.5/9, 15.0 million) and more than doubled Fox’s “Fringe” (2.0/5, 5.9 million) and the CW’s “Supernatural” (1.3/3, 2.7 million). On the comedy side, “The Office” (3.7/9, 7.4 million) and “30 Rock” (2.9/7, 5.6 million) continued NBC’s success in men 18-34."
From TVGuide.com: "The CW's dramas were similarly down: The Vampire Diaries pulled in 3.7 million viewers, and Supernatural drew 2.7 million viewers."
*Supernatural will return with new episodes on January 21, 2010 (and not on January 14th, as was previously announced).