I personally have never noticed any bias on EN world’s roleplaying news page, but then again I don't actually go anywhere else for my RPG news so for all I know WotC could be at this very point planning to give away copies of all its books free to anyone who sends a stamped addressed envelope.
However, I'm not particularly worried about bias from EN world as it has a face (i.e. Morrus) that I can recognise as individuals with an individual viewpoint. Where it starts to get tricky is where the news source is a faceless entity which claims to be impartial, such as the whole BBC vs. the government thing going on at the moment. In an ideal world we would never trust a single source, however in reality that's just too much effort for most of us