After only a few days, my apps are starting to show the amazing uptake of iOS 7. Here's my proportions in WSPR Watch from yesterday.
iOS 7 seems a bit rough at this point so I can only assume they rushed it out to be able to launch with the new iPhones last week. I'm sure there will be some updates in the weeks ahead. Having said that - it's fine for daily use and a refreshing change.
Update a day later. iOS 7 is still growing fast.