I'm all about comparing TV ratings, but last week'swas both (a) delayed every night by Wimbledon coverage, and (b) in repeats. As such, I don't view last week's ratings as particularly indicative of anything. The weekly chart is below for those who were waiting for it though.
Perhaps caused by the lack of head to head
The chart shows the late night weekly average adults 18-49 ratings for 2009 and 2010.
Note: The week ending 7/2/2010, thewas in repeats, and was delayed by Wimbledon coverage.
No more chart of the sequential weeks comparison betweenand Leno. That chart was always a bit apples/oranges because of the different seasons. While before the calendar runs of the shows overlapped we had to make do, now that we have some of the same time period to compare, the sequential chart has been retired.