Facebook is slowly rolling out a mobile interface change that lets you Like or comment on posts with a single click, I discovered this week and the company has confirmed. By making it quicker to Like, Facebook will be able to gather more data to refine its feed sorting algorithm while making content consumption faster and arguably more enjoyable. Previously, you had to tap a '+' button beside posts to reveal separate Like and comment buttons, but soon all users will click on different sides of a combined Like / comment bar to leave feedback. Sure, this is a subtle change, but it will affect over 110 million iPhone and Android users every day, plus everyone who visits m.facebook.com.