I only watch 24hr news channels when I'm bored and nothing else is on. So even though I'm not a huge fan of FNC, I'd still be more likely to watch their 3am show than CNN's prime time shows. I have better stuff to do/watch in the evening. (Even if I didn't, I don't think I could sit through an hour of Larry King Live unless I was trying to fall asleep.)
Edit:
I getting ready to give up on CNN during the daytime too. Their obsession with twitter and facebook is over the top. If I wanted to know that some nobody in Utah, that can't spell, thinks about the current news topics I'll go to twitter myself. Seriously it seems that around 10 minutes of every hour is spent reading comments off of twitter and facebook.