Apple has rolled out iOS 7 and in a few days the new devices iPhone 5S and iPhone 5C . As expected Apple has publish just 10% of the necessary information for web developers and I can say without fear of mistake that this is the buggiest Safari version since 1.0.
This post will present data showing how quickly users are updating to iOS 5.1. The data below is taken from the user base of my Audiobooks apps. Audiobooks is universal so provides data for both iPhone and iPad. The free and paid versions of Audiobooks together get around 100k weekly downloads so provides a statistically meaningful data set.