For the third week in a row, Jay Leno's adults 18-49 weekly ratings average has tracked at exactly the ratings of O'Brien's in the same week of each show's run.
David Letterman'swas in original episodes last week (April 19-23), and he picked up a tenth of a point in the adults 18-49 ratings vs. the previous week which was repeats, but was again beaten by the as he has been each week since Jay returned.
For the week, while Jay'sadults 18-49 overall average was a 1.0 and Letterman's ratings average was a 0.9, the adults 18-49 viewership difference was somewhat wider than those numbers would indicate (1.361m for Leno, 1.132m for Letterman).
/Letterman (2009-10) week 1 ended 6/5/09. Leno/Letterman (2010-) week 1 ended 3/5/10.
The/Letterman(2009-10) ratings do not include the final week the was in repeats prior to the Winter Olympics.
For historical reference, here are last season’s season-to-date averages through April 24, 2009:
11:35 p.m. ET
NBC “Tonight,” 1.4/6
CBS “ ,” 1.1/4
ABC “ ,” 1.1/4