Monday night's premiere telecast of "The Tonight Show with Conan O'Brien" generated "Tonight's" highest metered-market household rating for a Monday edition in more than four years and the seventh-highest Monday in the 17 years since Jay Leno began his run as "Tonight" host in May 1992, according to in-home viewing figures from the 56 local markets metered by Nielsen Media Research. The Monday debut of "The Tonight Show with Conan O'Brien" averaged a 7.1 rating, 17 share in metered-market households, "Tonight's" strongest "overnight" results since the January 24, 2005 telecast featuring a special tribute to Johnny Carson. Last night's 7.1 rating in the metered markets is up 82 percent versus the "Tonight" second-quarter average of a 3.9 rating in the 56 local markets metered by Nielsen. Versus his final telecast of "Late Night" on February 20, Conan was up last night by 173 percent (...