There is some evidence for sure. For example, iPad Safari doesn't allow full-screen mode, nor implements fullscreen API as per standards. Another browser on the

There is some evidence for sure. For example, iPad Safari doesn't allow full-screen mode, nor implements fullscreen API as per standards. Another browser on the iPad (Dolphin) supports it interestingly. Support for ordinary CSS properties like z-index, position:fixed and iframe is pathetic. Some of the things that I can recall now. UIWebView takes it to another level of pain altogether.