And yet... it's highly likely that there's a bias to the data here. The people most likely to be interested in and seek out Android phones and Android apps are

And yet... it's highly likely that there's a bias to the data here. The people most likely to be interested in and seek out Android phones and Android apps are also precisely the people most likely to be in O'Reilly's target market. So while it may say something about Android adoption among geeks, it doesn't provide any useful data one way or another about adoption among the general population.