By Tanner Stransky
Updated August 14, 2009 at 10:03 AM EDT

New episodes of Conan O’Brien’s The Tonight Show might be dominating the advertiser-coveted youth demographics, but they still can’t beat overall viewership numbers for repeats of David Letterman’s The Late Show, according to the New York Times. The margin is small — Letterman averaged just 7,000 more viewers than O’Brien — but the news is interesting because Letterman was airing repeats, while O’Brien was debuting new episodes. Such a feat has not been accomplished in more than 14 years. The good news for O’Brien, however, is that the kiddos love him. He only upped his dominance among younger viewers, beating Letterman by 62 percent in the 18-49 demographic. O’Brien’s median audience age is 46.8, which seems rather youthful compared to Letterman’s median audience age of 57.