All this reassuring back patting and pseudo-analysis from what is really a very limited set of data. In reality, the American market is only a small segment of the global market, and looking at its statistics alone hardly tells the full story. In fact, America isn't even the largest smartphone market anymore, as China now has that title, with India and Brazil not far behind.
Here are the true global statistics
You can see that the true year on year story is the absolute dominance of Andriod. Most impressive is not the market share, but the number of units sold, where amazingly, Android has doubled the number of units.
Here's the data by manufacturer
Apple is not only falling behind the Android wolfpack, but is also starting to trail Samsung by a large margin. Some might say that Apple still leads in profitability (though I would like to see updated data for this), but I think such an incredible surge from Android is a mere inkling of the true future dominance of Android.