Six weeks back and six Leno Tonight Show ratings wins over Letterman’s Late Show.

For historical reference, here are last season’s season-to-date averages through April 10, 2009:

ADULTS 18-49
11:35 p.m. ET
NBC “Tonight,” 1.4/6
CBS “Late Show,” 1.1/4
ABC “Nightline,” 1.1/4

11:35 p.m. ET
NBC “Tonight,” 5.2 million viewers
CBS “Late Show,” 3.9 million viewers
ABC “Nightline,” 3.9 million viewers

For additional historical reference, here is the chart of the adults 18-49 ratings for the entire run of Conan O’Brien’s Tonight Show, minus the final week of repeats prior to the Winter Olympics.

Note that earlier versions of the Conan/Letterman chart had a rolling 4 week average line. It has been removed in favor of a “connect the dots” line.

Posted by:TV By The Numbers

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