Most of the time when a show is entering its final season or the last few episodes it gets a boost in the ratings, especially when announced in advance. The opposite appears to be true for Oprah. Since she announced she was quitting her show, people have started watching Judge Judy way more and watching Oprah way less.
Two weeks ago, for the first time in the 24 year run of her show, she got a 2.9 rating. She had never been below a 3.0 ever. From day one she was above that. No one is watching her. It is like people have said why bother since I will have to find something new to watch later anyway. Maybe she is leaving at the right time. I think Ellen is so much better than Oprah, but I will also admit they have two entirely different kinds of programs.
The other thing is that Oprah has launched lots of successful show hosts of her own and I bet if you combine all their ratings they would blow people away.