A study concluded The Colbert Report is better at informing people about what is happening in the world and electoral campaign than any other news source. [iinsert Fox News joke here.]
An older survey found that The Daily Show with Jon Stewart is second to NPR at relaying accurate information to their audience. Fox News last in that study as well. They hit back at the university that did the poll saying, and I kid you not, "their student body does not deserve to be so ill-informed."