How fast is fast enough?
Ricardo Jota, Albert Ng, Paul Dietz, Daniel Wigdor · 2013
Although advances in touchscreen technology have provided us with more precise devices, touchscreens are still laden with latency issues. Common commercial devices present with latency up to 125ms. Although these levels have been shown to impact users' perception of the responsiveness of the system [16], relatively little is known about the impact of latency on the performance of tasks common to direct-touch interfaces, such as direct physical manipulation.