So it's not "if you are going to get a bias" it is how big is the bias. Looks pretty big to me. But then the pro-business side of the WSJ looks pretty big to me too, as does the conservative slant on Fox. I can't recall, actually, a media organization that didn't look pretty slanted to me. -XC
But, I don't have a Volvo, and I voted for a GOP governor last election, I don't support affirmative action, and NPR is the best mainstream news source I've found. It's far from perfect, but even if you step back and compare, it does a better job than most. Still, I do wish we had a US media discourse that allowed for more pluralism and nuance. IMO the team politics and ideologies that dominate make fools of us all.
NPR, like all news organizations, makes gigantic mistakes on topics I know well, and that means they do the same on topics where I have little/no knowledge. As for perception of bias, well, we all think we're centrists. :-)