UPDATE: Ahh, I see the problem. You linked to a OS market share graph, not a browsing market share. I didn't dispute there are more Android devices, I said the iOS devices are used to browse the web much more than the Android devices, even if they are fewer. Also, not including iPad share by StatCounter is silly. The iPad's browsing share is quite large.
It's not sales or installed base share, it's browser share.
I could put the difference down to just iPads, which apparently have much higher browsing rates than mobile devices, but the numbers don't agree there either e.g. my source has iOS as lower than Linux whereas your numbers has it as twice as high.
(Once you add iPad numbers you start to wonder why netbooks aren't included and then the fact that iOS and Android numbers total are dwarfed by any single version of IE begins to make it seem ridiculous.)
http://www.netmarketshare.com/2010/07/01/iOS-vs-Android-in-B...
UPDATE: Ahh, I see the problem. You linked to a OS market share graph, not a browsing market share. I didn't dispute there are more Android devices, I said the iOS devices are used to browse the web much more than the Android devices, even if they are fewer. Also, not including iPad share by StatCounter is silly. The iPad's browsing share is quite large.