TouchEvents have changed in Chrome to return float values, instead of integers, to account for varying screen densities. This leads to more detailed feedback during slow gestures.
You and your users want mobile web apps that react and scroll smoothly to the touch. Developing them should be easy but, unfortunately, how mobile web browsers react to touch events during scrolling is left as an implementation detail in the TouchEvent specification.
Every click interaction in mobile browsers is hampered with a 300ms delay, but that's gone in Chrome 32 for mobile-optimized sites!