I've been seeing this chart and variations on it floating around for a while, most recently on Facebook with an overlay that shows the "range" in which these media corporations present content. 

From the site's methodology page, they say "During this project, nearly 1800 individual articles and TV news shows were rated by at least three analysts with different political views (left, right and center). We had 20 analysts, each analyst having analyzed about 370 articles and about 17 TV shows. Each analyst rated approximately three articles from each of the over 100 news sources available for viewing on the Chart. As a result, we have nearly 7,000 individual ratings."

That ... doesn't sound like a sufficiently large sample size to me?  But I'm not a stats guy.  Is this just an eye chart that makes people go "yeah, that looks about right" or is there some real insight here?