The web commentary today is that while conservatives hold their own on certain parts of the web, the internet in general tends leftward and will become more so. The evidence is that Google News favors stories slightly left, and Wikipedia editors include some far-left people.
It hasn't seemed that way to me. When I have read wikipedia articles, I have at times thought "hmm, conservatives might call that point slightly buried," or "I'm not sure I'd give so much space to fringe-left views, even if you're providing a counter-view," but this has been rare, and mild. I would certainly agree that wikipedia does not lean rightward, but if there is a leftward tilt, it isn't strong. I suppose if I start running into articles where I feel the dice are weighted I might have increased suspicion on other articles. Whatever their personal feelings are on the matter, the wiki writers have done well by me so far.