Twitter and Facebook offer different advantages to journalists. Twitter’s short-form nature means journalists aren’t expected to do much more than tweet the headlines and links to their articles, unless they also want to engage in discussion. Twitter’s public nature discourages low quality replies, so journalists don’t have to slog through thousands of comments the way they might on Facebook. It’s also easy to measure impact and success, even if inaccurately, by counting retweets.
Facebook on the other hand, requires journalists to craft compelling updates that stand out against the social content produced by their audience’s friends. Images, captions, and context have to be selected. Though comments to Page stories are also public, they’re not as visible as @ replies to a user’s own friends, leading large publications to receive hundreds of comments per post. While journalists want this engagement, many are too busy to actually wade through the comments and respond.