UPDATE 9:45AM: The fast nationals for Conan’s second show on TBS are in. It drew 2.8 million viewers, down 33% from its premiere audience and lower than its broadcast counterparts. Despite the decline, Conan is expected to once again dominate the young demos with 2.1 million viewers in 18-49 (down 35%) and 1.4 million in 18-34 (down 42%). Its median age stayed steady at around 30, probably still the youngest in latenight.
PREVIOUS 7:30AM: A ratings dropoff after the big Monday night premiere of Conan was inevitable: the question was how steep it was going to be. In the metered markets, the TBS show posted a 2.1 rating last night (when adjusted for Mountain time zone), down 28% from the premiere, which beat all latenight shows. Last night, Letterman drew a 3.0/8, Leno 2.5/7, and Nightline 3.2. More data will be available soon.