What Liberal Media?

Two years ago, I proposed a test to determine if there is a liberal bias in the media. Since then Instapundit has added it as his "Name that Party" entry.
But that doesn't mean that the media are actually liberal does it? (Disclaimer: I am using the term liberal to mean Leftist. This is different than the liberalism that refers to a broad array of related ideas and theories of government that consider individual liberty to be the most important political goal.) After all, Johthan Adler says there is bias the other way because news organizations are corporations, and corporations will always act to protect their interests.
Except corporations like any organized hierarchical structure are often taken over from the bottom up. So that logic fails in the face of evidence. For proof of that fact, I give you the New York Times. If they were a purely commercial venture, why would they give MoveOn a break of approximately $100,000 for their ad that slandered the commanding general in Iraq?

No, deniers of media bias are I suppose either clueless, immersed in self righteousness, or just plain daft.