Probably not as significant a number as you might think. Most users will probably just assume it is the latest upgrade of the Maps application. And beyond that, depending on accuracy, there might not be a whole lot of reason to stop using the Apple maps application anyway. Depending on accuracy, the only reason I can think of why I might still want a Google Maps app would be for transit system directions. And regular use is the thing Google would care about.
8/2/12 at 12:58pm