Originally Posted by Sil_liS
I'd like to point out that those numbers are not market share, they are ownership.[...]
Let's say that there are approximately 250 million adults in the US.
According to the data in 2011, 11% of them owned tablets, so 27.5 million (22.275 mil ipad, 4.125 mil Android, 1.1 mil other).
According to the data in 2012, 22% of them owned tablets, so 55 million (28.6 mil ipad, 26.4 mil Android of which 11.55 mil Kindle fire).
Does this sound right?
Nope, as that would mean that Apple only sold ~6.5m iPads in the US in a year, which isn't right.
We know from released court documents that Apple sold over 10m iPads in the US in the first two quarters of 2012: http://www.macrumors.com/2012/08/10/...in-court-case/
I suspect that the figures are actually %age of current sales, not %age of ownership. At the end of Q2 2012 Apple had sold a total of 34m iPads in the US. That is a pretty big head start in total ownership.