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It may take a while for some of us to upgrade. I just upgraded my wife's iPhone 4S today.
One other comment. With such a short article, maybe you should proofread them prior to submitting? You have two errors in you first paragraph. I have been noticing errors more nd more these days in electronic and hard copy articles! An alarming trend...
1 year, 8 months ago on iOS 6 adoption barely increased after Google Maps release - Maps not really an issue then?