You've probably seen this report
on how few people who see their Google News front page actually click through to the story. Is there any evidence out there on how many people who take in a printed newspaper actually read the stories rather than scan the headlines? One has a click measure, the other does not. You could only get the latter from a survey, where may be some false reporting of reading. Not saying, just saying...
I understand, by the way, that the question is whether the newspapers are getting the clicks to report to their online advertisers. But I think some want to draw a point about the news knowledge of the online reader. I just don't think it's that clear.