While the average Facebook user may still not have made the switch to the social network’s new Timeline format, as of March 30, 2012, all brand pages were required to do so, and some brands have been seeing increased engagement as a result.
Social media measurement company Simply Measured looked at 15 brand pages that were early adopters of the Timeline format and found that average engagement on brand posts (i.e., comments and “likes”) rose 46% in the three weeks after the switch compared to the three weeks before. Prior to the Timeline introduction, the 15 brand pages saw an average of 1,672 points of engagement per post, rising to 2,441 after switching to Timeline.
via Has Timeline Increased Engagement on Facebook? – eMarketer.