Okay, first, let me point you to this, then I'll give you examples of what Bronx is referring to: 
 
Examples: 
June 16, 2010 
June 17, 2010 
Aug 8, 2010 
Nov 30, 2010 
Dec 28, 2010 
June 4, 2011 
And a discussion about how ineffective the ratings actually are can be found here. 
My point is, relying on ratings, no matter how prolific, may not be the best indicator of a good story.