Do people take Fox News seriously?

I don't watch the news very much, but from the articles I read online and what I hear from others, both Fox News and MSNBC are biased, especially their prime-time commentators. O'Reilly, Olbermann, Beck, Maddow, etc. are entertainers, not newscasters. And Colbert is a comedian, yet people tend to take the opinions of comedians seriously.

Really? I find the online articles to be a lot more neutral than anything they talk about on the air. O'Reilly, Olbermann, Beck, etc. may be entertainers, but I'm not sure the laymen considers them that, and instead take them seriously; I'm not sure how someone would come to the conclusion that they were entertainers (They're on a news channel, wearing suits, solely talking about political issues) without dissecting what they're saying, which is more credit than I give to most Americans. By the way, Colbert is really biased against bears, but I really doubt if anyone really takes those comments seriously.