Without looking at the stats, I can tell you why: Fox news isn't news as much as it's opinion.
Fox News viewers are less informed than people who don't watch any news, according to a new poll from Fairleigh Dickinson University.
The poll surveyed New Jersey residents about the uprisings in Egypt and the Middle East, and where they get their news sources. The study, which controlled for demographic factors like education and partisanship, found that "people who watch Fox News are 18-points less likely to know that Egyptians overthrew their government" and "6-points less likely to know that Syrians have not yet overthrown their government" compared to those who watch no news.

Jim Lehrer seemed ok too.People cant just blame the media though.Most people are too busy
or see it as futile to pay much attention I guess.