Great piece from Ars Technica which led me to a few thoughts. Even though Android has the dominant market share of devices sold, Apple’s Safari mobile browser that only runs on iPhone and iPad has the lion share of mobile browsing: 45% versus 19%. This would suggest that users of Apple devices are not only buying more apps than Android owners but actually engaging more with web site on these same devices. The only thing that is not mentioned is the proportion of the iPad versus iPhone users, I suspect that then iPad users are taking the lead here due to viewing size and being the format that least requires web developers to implement a responsive design. Unfortunately there is no real way of verify device type properly.
Source Ars Technica