Noticed one thing.
On iPad air, when I select a preview image on the App Store (to enlarge it), the animation is awfully laggy (android 2008 laggy, 5 fps). This is with increase contrast OFF. When I turn increase contrast ON, the same animation is buttery smooth. There are obviously some issues with transparency in iOS 7, and it's not only when it is used (like keyboard). There is no transparency used in image preview in the App Store, yet, it is very very laggy.
I guess smoothness is the only thing we lost (or went backwards) with iOS 7 (currently), for me at least.. Hopefully 7.1 fixes all of this issues.
Try the same thing on your devices and post. (It is smooth on my iPhone 5)
On iPad air, when I select a preview image on the App Store (to enlarge it), the animation is awfully laggy (android 2008 laggy, 5 fps). This is with increase contrast OFF. When I turn increase contrast ON, the same animation is buttery smooth. There are obviously some issues with transparency in iOS 7, and it's not only when it is used (like keyboard). There is no transparency used in image preview in the App Store, yet, it is very very laggy.
I guess smoothness is the only thing we lost (or went backwards) with iOS 7 (currently), for me at least.. Hopefully 7.1 fixes all of this issues.
Try the same thing on your devices and post. (It is smooth on my iPhone 5)