UPDATE: 11 AM: ABC did not order rush national numbers for Paul McCartney’s Jimmy Kimmel Live concert/Hollywood Blvd. shutdown. But in Nielsen’s 56 metered markets, NBC’s The Tonight Show (2.9/8) and CBS’s Late Show with David Letterman, with former POTUS Bill Clinton as guest (2.6/7), both out-rated JKL (2.3/6) in households.

In the 25 markets with Local People Meters, Leno (1.0/5) also edged Kimmel (0.7/4) in the 18-49 demo; Kimmel was virtually tied with Letterman (0.7/3). FYI, Kimmel is usually strong in the metered markets relative to final national stats, while Leno is usually flat to a little understated, and Letterman gets understated in the metered markets.

PREVIOUS, 7:18 AM: On the first night of the new TV season, the late-night war escalated between NBC’s The Tonight Show and ABC’s Jimmy Kimmel Live. While JKL closed down Hollywood Blvd. for a free Paul McCartney mini-concert (two songs for JKL —  13 more for the estimated 10,000 fans on the street), Tonight welcomed Justin Timberlake, who talked about President Obama, but did not perform because, a source said, he felt under the weather. Timberlake is scheduled to perform his own mini-concert for JKL and fans on Hollywood Blvd. tonight. Check it out below:

Paul McCartney closes Hollywood Blvd:

Gayle
12 months
Wow! Sorry I missed Paul McCartney's concert. He is an ICON, and enjoyed by people of all...
Seth
1 year
Ad Myth #1: younger demographic is desirable. Reality: the only people with deep pockets of wealth left...
Who Cares
1 year
Joke, JT sings out-of-key. Yawn.

and:

Justin Timberlake talks about President Obama with Jay Leno: