On a big night overall for ABC, the Network’s success in primetime extended well into Late Night.  ABC News’ “Nightline” delivered a 2.1 rating in Adults 25-54 in the LPMs, beating NBC’s “The Tonight Show with Jay Leno” by 17% (1.8) and CBS’ “The Late Show with David Letterman” by 40% (1.5).  With an appearance by “The Bachelor,” Jason Mesnick, ABC’s “Jimmy Kimmel Live” beat NBC’s highly-promoted debut telecast of “Jimmy Fallon” in the Metered Market Households by 9% (2.5 vs. 2.3).  In addition, in the LPM markets, “JKL” topped “Jimmy Fallon” by 27% among Women 18-49 (1.4 vs 1.1) and by 50% among Women 25-54 (1.8 vs. 1.2).