Someone's not thinking clearly about this "market share" idea. Seriously.
For one, most people do NOT care a bit. Shareholders might, but the majority do not.
So looking at this fact, a non-shareholder's "market share" is solely him/her self.
Thus, if I own an iPhone the market share for this market (myself) is saturated at 100%. Same results if I had an Android phone.
The stats are also clearly slighted. The iPhone only resides upon 1 carrier at the moment in the US, while Android exists upon many. Comparing them within the US market is like comparing hammers to blizzards.
For a proper comparison, right now, one would have to use the statistics from a non-US country where the phones are available on the same carriers with the same data plans.
Use that data, then you *might* have a better understanding on who is what and why. Otherwise, the statistics (and those that put them together) look rather ignorant.