With the long anticipated announcement that Katie Couric is leaving CBS Evening News, the media is filled with lots of nice things being said about Katie. (And rightly so, contemporary Virginia alumnae that she is!)
Sadly there's not much nice to say about her ratings.
The CBS Evening News ratings fell during the "Couric era", and more importantly at a time when all the broadcast ratings were trending down, CBS also lost ground to the leading NBC Nightly News as well.
The chart below shows the quarterly average adults 25-54 ratings for the broadcast evening news shows. The first point is Q2 2006. The "Couric Era" began during the final month (September) of Q3 2006.
Quarterly average adults 25-54 ratings (Live+Same Day)
Source: The Nielsen Company via TVB