Also I wonder how they distinguish between "tablets" and "phones", since these are the same kind of thing, and it's only Apple that uses two brand names. In the Android world, there are loads of devices, with a continuum of sizes from small to large. Android itself has a concept of 4 screen size categories (which scales better, imo, given the popularity of 5-7" devices), and I don't know if any of that info is available to a website.
More generally - so ipad users, just like iphone users, are more likely to reload Facebook all day, but so what. My phone is still useful to me, even when I'm not using the web. Maps, email, video, music, software are all things Android phones and tablets do.
Is Cook really saying he doesn't know what else a tablet could be used for other than web browsing? (I also dislike his implication that the popularity of Android tablets isn't true - "if" - apparently facts about sales are a lie, but he's happy to accept web stats which are well known for being unreliable?)