The main reason it had so strong ratings is because that Duke/Kansas March Madness game went into overtime, and people left their TV sets on.
Back about 10 years ago when I was tracking ratings for the Sunday talk shows, I noticed that the morning shows that led into them almost always had nearly identical ratings to the talk shows themselves. When it comes to live programming, lead-in is probably the biggest factor in ratings, and the actual content of the show is almost irrelevant.