We're kinda talking past each other. Of course Op-Ed pages are biased. I'm not disputing that nor do I have a problem with that.
Just dismissing them as biased because that's what op-eds do misses the point. I was only pointing out that in a vacuum, it's not a complete representation of what the given media entity is trying to accomplish. Their own demographic makes it difficult for there to be any balance (again, not that there has to be). However, the slant of the entity affects their reporting as well. That was my point.
I don't think the media is biased because of their op-ed pieces. They are biased because a disproportionate number of them lean a certain political direction. They are biased in their reporting on purpose, as my father found out and lived through over many years. It's the reporting bias that makes the opinion pieces hard to trust because it bleeds across the lines of opinion versus reporting.
Swamphawk is clumsy with making his point, but the mainstream media is certainly bias in their coverage - sometimes overtly, other times simply as a part of the background. It does not just exist in the opinion section.