I'm not sure i agree with his reasons, mostly because what the data really shows is that Android users don't really browse on Wi-Fi [1] (on 3G the discrepancy - device marketshare vs browsing marketshare - is much lower).

My opinion (with anecdotal evidence) is that Android users just stick with their PCs when at home (presumably when they have Wi-Fi), whereas iOS users prefer the small screen, for some reason.

[1] http://blog.cloudfour.com/explaining-the-ios-and-android-mob...