27 November 2012Steven Noyes, commenting on an Asymco article:
As time went on, however, and the number of devices available increased, the counting did not account for old devices being activated under new/different users and this led to many discussions on how to handle this. To change the counting to the more complex device query of looking through the entire device database would cause a drop (at this time 18 month back) in activation numbers of between 30-40% resulting in a political nightmare.
It’s impossible to know whether this is true or not, but you’d like to think Google are reporting accurate numbers. Hopefully, Google PR will clarify this.