It is interesting that two of the four categories in their analysis can be easily described as "niche usage" and one of the others relies on the mobile web brow

It is interesting that two of the four categories in their analysis can be easily described as "niche usage" and one of the others relies on the mobile web browser. The single most common form of smartphone usage, mobile apps, shows that ad impressions on Android far exceed iPhone. I don't know how you draw usage conclusions from that though. Is it because the barriers to entry into the Android market are much lower? What about the comparative availability of paid vs. ad-supported apps on Android and iPhone? If the research does indeed show that Android users spend less than iPhone users, is that a reflection on loyalty to the platform or the affluence of the userbase? So very many variables are completely ignored here that it's hard to fathom how the author believed there was a point to be made.