I keep seeing these silly pie charts all the time but can someone tell me where is this data actually coming from? Especially when Amazon never reveals sales figures for the Kindle Fire? How do we know it has 21% market share? And 21% market share of what? How do we even know what the total market is? Again, who on the android side is revealing sales figures for their tablet? Even Asus with the Nexus 7 didn't give out hard figures. All they said is they were selling about a million a month. Microsoft has never released sales figures for the Surface RT.
And if Apple's market share is declining so much how come all of these statistics for web usage show iPad dominating? Are people not doing any web browsing on these other tablets?
Estimates come from simply calling part manufactures and assembly plants, with a bit of estimation.
21% of all total tablets built.
As to web usage, very easy to tally, and simply shows iPads are by far the most used device.
I guess people buy 'droid tables to say "I have a tablet", but really have no idea how to use them.