Quote:
Originally Posted by
Vaelian 
Do you actually have a source for this? Because your post doesn't make sense considering that it doesn't happen on the iPhone 4S, which is a dual core system.
I’m a developer, had experience with similar issue, which led to detailed examination on how scrolling works on iPhone. You can’t see it on iPhone 4S in Mail, or other app which is idling when you scroll, but if an app performs some task on main thread (or a task that constantly syncs with main thread) then you likely to get this syncing issue on any iPhone. And this is, indeed, a thread syncing issue by all accounts: main thread is responsible for both animation and user input, so when you get neither (on video scrolling stops and input is ignored) but the app is still running (after a whille scrolling will be unstuck).
In my case, that was fixable within the app. In this case it can be fixed like all thread syncing issues in generic UI component: with iOS update. My guess the culprit here is the higher frame rate on iPhone 5 (If iOS will set it to lower value for scrolling that would be enough) or similar trick, which can be done in an app. Of course, there are proper ways to fix it too. And, there’s a chance it is app-specific, and not every scrolling app affected.
Perhaps I’m not very good at explaining stuff, but still, it should be obvious from what I said above that it has nothing to do with hardware. Think of hardware touch input as of a camera that takes frame every set period of time. If you move finger too quickly before the lens it may not end up on any picture, but that’s all. So, if you are swiping and tapping fingers with superhuman (or monkey) speed some of it will be ignored by the hardware, but it’ll pass the rest of the input to the software, which will interpret it on a higher level.
Hope, it explains things.
