Over on Google+, Andy Rubin says:
There are now over 700,000 Android devices activated every day…and for those wondering, we count each device only once (ie, we don’t count re-sold devices), and “activations” means you go into a store, buy a device, put it on the network by subscribing to a wireless service.
This does clear up some points people have been wondering about, but it raises larger questions. Like, why aren’t those users showing up in the comScore statistics?
700K users per day ought to translate to about 21M a month. But Android has only been gaining 2M U.S. smartphone users and change per month. If comScore isn’t way undercounting, that implies than a bit less than 9/10ths of daily Android activations are tablets or overseas.
That percentage seems pretty high to me. But I don’t have any alternate theory.