UPDATE: 10:45 AM:  Jimmy Fallon led comfortably in the ratings last night, despite Jimmy Kimmel’s big “get”  —  first-ever JKL appearance by former President Bill Clinton. Fallon got a last-minute assist from former VPOTUS-candidate-turned-reality-TV-regular Sarah Palin. In Nielsen’s 56 metered markets, The Tonight Show Starring Jimmy Fallon scored a household  3.0/7; CBS’ Late Show With David Letterman a 2.5/6, and ABC’s Jimmy Kimmel Live a 2.4/6. In the 25 markets with Local People Meters, adult 18-49 results were: Tonight at 1.1/5; Late Show’s 0.5/2; and JKL’s 0.8/4. Watch Clinton and Kimmel here: (more…)