'Late Show' outdraws 'Tonight' for first time since '05

The "Late Show" drew more viewers than the "Tonight Show" in last week's ratings -- the first time the CBS program has pulled a larger audience for a full-week average since 2005. NBC's program still firmly won among the key adult demo.

"Late Show" averaged 3.5 million viewers and a 0.8 rating and "Tonight Show" averaged 3.3 million and a 1.3 rating.

Though the adult demo is considered more important to advertisers, and is therefore, well, more important, CBS winning in viewers hasn't happened in years and this is the smallest "Tonight Show" weekly audience on record (since at least 1992). 

NBC countered that Conan O'Brien won "in every important demo" and said the "Tonight" audience is 11 years younger than David Letterman's. Also, Conan's demographic lead over Letterman is better than Leno's last year.

CBS notes that the margin between the two programs in the demo keeps narrowing, going from a 1.4 spread during premiere week to 0.6 two weeks ago to 0.5 this past week.

Here's full weekly averages for all the late-night programs:

ADULTS 18-49

11:35 p.m. ET
NBC "Tonight," 1.3 rating, 6 share
CBS "Late Show," 0.8/3
ABC "Nightline," 0.7/3

12:05 a.m. ET
ABC "Kimmel," 0.4/2*

12:35 a.m. ET
NBC "Late Night," 0.7/4
CBS "Late Late Show," 0.4/3

1:35 a.m. ET
NBC "Last Call," 0.4/3*

TOTAL VIEWERS

11:35 p.m. ET
NBC "Tonight," 3.3 million viewers
CBS "Late Show," 3.5 million viewers
ABC "Nightline," 3.0 million viewers

12:05 a.m. ET
ABC "Kimmel," 1.3 million viewers*

12:35 a.m. ET
NBC "Late Night," 1.6 million viewers
CBS "Late Late Show," 1.5 million viewers*

1:35 a.m. ET
NBC "Last Call," 0.9 million viewers*