Not expressed too well, but I think she means by "concept" the choice of stories, e.g., anything about global warming from "environmentalists" is treated as hard news, though they may have dissenters comment. Oil for Fraud is simply not a story, except on Fox. Pro-abortion marches are hard news, though dissenters may be allowed to comment; anti-abortion marches never happened. Etc., etc., etc.
My interpretation: They report both sides but highlight the LIBERAL stuff (beginning with a pro LIBERAL or anti-conservative headline) and put the conservative stuff at the bottom of the page, use inflammatory adjectives and/or edit it.