Is The Recent Facebook Emotional Testing Much Ado About Nothing (New)?

By now you've heard the news that Facebook recently conducted an "emotional experiment" whereby they manipulated the news feeds of users, nearly 700,000 of them. Conducted in 2012, the experiment or study or whatever you want to call it, was conducted over a period of one week and saw researchers alter the amount of positive and negative content in users' News Feeds to study how they responded.