WebKit's fast tap functionality has come to Safari in iOS 9.3 (see documentation). I work on an e-reader app that uses a web view to display text. We still use UIWebView because of various bugs in WKWebView, but I can switch out to WKWebView very easily for testing purposes. We have our own custom touch handling to get around the 350 ms touch delay so links feel faster. I just tried out the fast-tap thing, and it only appears to work in WKWebView. Is this correct / confirmed / documented somewhere? Or should fast-tap work in both UIWebView and WKWebView?
Update: here is an article about some changes toward the current fast-tap behavior in iOS 8 that only appeared in WKWebView. But nothing about the new iOS 9.3 stuff.