These numbers don't make much sense to me. Only 2.5% of the site's users are running 1920x1080x32? Only 4% of people going to an EFF website are in the Pacific timezone?
And yes, 1080p is still a fairly uncommon resolution in this laptop era. StatCounter estimates 7-8%, and it's somewhat likely that StatCounter and EFF are going to have different skews [2]
[1] http://www.newtimezones.com/pdfs/current_economic_crisis.pdf
[2] http://gs.statcounter.com/#resolution-na-monthly-201302-2013...
Sounds ballpark reasonable to me - Europe is twice the population of USA, and USA is split over more timezones. And Asia has more people than USA and Europe put together.
I think it mostly goes to show that it doesn't take much information to reduce the number of possibilities by 1-2 orders of magnitude.
In my case, Safari on iPad makes me 1:67,000. Chrome on the same iPad makes me 1:1.6 million.