Looking at the numbers, though, I'm not sure it says what you think it says. My impression is that it says that people who are interested in politics -- political humor from Jon, major newspaper websites, O'Reilly Factor watchers -- know more than folks who just passively consume news every now and then (Fox News Channel). That's the way the data looks to me, anyway.
I need to go back and study it some more, because from the abstract at the bottom, titled "Knowledge Levels by News Source", The Daily Show/Colbert Report looks like it's tied or bested in almost every category by folks who read newspaper websites. In fact, if you call the margin of error around 4%, there's really not much difference in the top several items. And I can't believe something like this would be accurate down to 1 or 2 percentage points or less.
Looking at the numbers, though, I'm not sure it says what you think it says. My impression is that it says that people who are interested in politics -- political humor from Jon, major newspaper websites, O'Reilly Factor watchers -- know more than folks who just passively consume news every now and then (Fox News Channel). That's the way the data looks to me, anyway.