I can't tell whether this is sarcasm or not. If you were holding out hope that PBS was somehow impartial, I've got awful news for you. Perhaps I'm thinking of NPR and confusing them. You mean the PBS News organization that was anchored by Gwen Ifill, right? Because even with their "balanced panel," I was never under the impression they were that special when it came to media bias. To non-corporate reporting, maybe they stood out. But not for bias.
Or am I dreaming? I distinctly remember trying PBS in my twenties and not being at all impressed other than their left/right panel counterbalance for their sort of op-ed people.