This is interesting, it seems that the iPhone 5 and the iPhone 4 have the fastest touch screens of any smartphone to date, according to Agawi, a new company with a lot of spare time to experiment with this kind of things.
According to MacRumors:
Using a 240fps high frame rate camera along with a custom-built device called a Touchscope, Agawi measured the App Response Time (ART) of several different smartphones. The ART is the latency experienced between the time a user touches the device display to the device’s on-screen response.
Apple’s iPhone demonstrated a minimum app response time (MART) of 55 milliseconds, a much better performance than the Galaxy S4, which had a MART of 114ms. The Lumia 928 had a similar high MART time of 117ms, and the iPhone 5’s closest competitor was the iPhone 4, with a MART of 85. The HTC One and the Moto X had the highest MART times, coming in at 121 and 123ms, respectively.
App responsiveness is judged by how quickly the app can respond to your inputs,” said Rohan Relan, cofounder and CEO of Agawi. “Smartphones with touchscreens that have lower MART scores feel snappier. This is probably why, to many users, the iPhone keyboard feels more responsive than an Android phone keyboard.