Golly, according to all these studies from Facebook marketing companies, and from Facebook itself, mobile Facebook users are totally awesome! Users who click on a mobile sponsored story are more likely to Like or comment than users who click on a Facebook web ad (including those undistinguished units that run on the right rail), according to AdParlor. Yeah, all 15 of them. Okay, that’s not fair, but it’s mighty early to bet on this kind of result. Better, perhaps, to be skeptical before we hear some commentary on Thursday’s earnings call. And the big question remains: is mobile usage still incremental, or is it starting to replace desktop time spent with the site?