Did some googling and here are the countries those numbers apparently reflect:
- Asia/Pacific (excluding Japan and China) (available for 15 countries)
- Canada
- Central and Eastern Europe (available for 16 countries)
- Japan
- Latin America (available for 19 countries)
- Middle East and Africa (available for 26 countries)
- PRC
- United States
- Western Europe (available for 16 countries)
That makes the figures more credible, IMO. If it was just the US, I'd believe that 32% of folks have iPads, but I'd be shocked if 21% had Samsung tablets. I'd guess that here in the states Fire tablets outsell Samsung ones, and probably by a wide margin, with Apple in a comfortable first place.