Would I, with my naked senses (eyes, touch) be able to tell the difference between a 55ms response time and 117ms response time? Alternatively, does such a difference add up or combine with other factors that ultimately make it noticeable to me? How? And while we're still at it, is this winning performance by Apple touchscreens a function of the quality of the screen itself (or components), other hardware (ICs and what nots) that work with the screen and are a factor in how it responds, superior code at OS level? I'd love to hear such details, as opposed to merely telling me 55ms vs 120ms.