I for one can tell there is a bias. Even in Google News the default new publications are liberally biased. I have tried using filters to block Huffington Post and New York Times etc and then replacing them with Conservative News outlets to no avail.
I believe the censorship is ridiculous. Reminds me of how liberals called conservatives nuts for suggesting that the IRS was targeting Conservative business owners and 501 non profits during the Obama years only for the IRS to recently admit doing so.