On Tue, Apr 19, 2016 at 11:52 PM, Erik Zachte <ezachte(a)wikimedia.org> wrote:
Like Nuria said: this is unique devices, not unique
people. Many people in
the Global North use more than one device to access Wikipedia (desktop,
tablet, phone).
Sure, and browses which rejects or periodically delete cookies will be
counted multiple times, and a device might use multiple browsers
(especially the embedded browsers on mobile devices)... even taking all
that into account, a factor of four seems like a large disparity between
this data and the audience panel numbers.