The Huffingpost a/b tests their titles: http://www.niemanlab.org/2009/10/how-the-huffington-post-uses-real-time-testing-to-write-better-headlines/ http://www.ni

The Huffingpost a/b tests their titles: http://www.niemanlab.org/2009/10/how-the-huffington-post-uses-real-time-testing-to-write-better-headlines/ http://www.niemanlab.org/2009/10/how-the-huffington-post-use...