I don't disagree with what you quoted. However, I should have been clearer that I'm talking about media organizations who distribute nationally, such as CNN, NBC, ABC, CBS and to an extent, the NYT.
Local newspapers in liberal areas probably do display a left bias because that is their market. So, for example, the SF Chronicle, which is the most circulated paper in the Bay Area where I live, I believe does display some liberal bias. Similarly, no doubt a paper like the Dallas Morning News has a right leaning bias, though I can't verify that for sure as I haven't really read it. It just wouldn't surprise me.
Like I said, the media does whatever it does to make money, period. If in a given case that means having a left or right bias, then that is what they'll do. It just doesn't make any sense for national media to have such a bias, unless you're FoxNews and you're the only one competing for a large bloc of viewers who have convinced themselves that the rest of the media is against them.
I think what the academic studies which parse through media content for evidence of bias are finding is that national media displays little if any bias, while the biases in various local media pretty much balance toward neutrality by cancelling each other out. Hence, no media bias on the whole, which doesn't mean that one particular publication has no bias.