I think you will find that all publications are biased...withstanding a few...like Consumer reports. Magazines cater to their target audience and to their heavy spenders. You don't see Murder Dogg giving rave reviews to East Coast acts....they cater to the West. Until somone forms a non sponsored, non profit magazine dedicated to giving unbiased reviews...get used to it.
Remeber it all boils down to opinion.....say you thought some underground act from NY was wack and did a review saying this....would it be right for that rappers fans to tell you that you are ignorant or biased and don't know what you are talking about.
Its all business, politics, and opinion...take it for that, and no more.