An animation lag has been disturbing me since iPhone 6 plus, but it seems that few people were paying attention to this issue before. Today I visited app store to check if new iPhones have this issue and was surprised to find out that all devices were lagging in recent apps screen. I observed lag during quiting apps and closing folders. Then I decided to search the web if same issue has been observed by someone else. I found out this thread: https://discussions.apple.com/message/30695158#message30695158 So now there many oeople observing this lag. It seems that Apple is loosing it's butter smoothness that it used to have on devices like iPhone 4, 4S, 5 and 5S. Therefore iPhone users should escalate this issue in order to let Apple see this problem and fix it.