For comparison, here's another set of benchmarks from a guy who appears to use the same methodology (240fps camera, count frames between input and screen response in custom lightweight apps).
And, to add a tv game console into the mix, apparently the latency between input on a PS3 wireless controller and home screen interaction is also about 50 ms.
http://www.collectingsmiles.com/news/measuring-latency-in-co...
iPhone 5: 81 ms
Galaxy S3: 104 ms
Galaxy Note: 71 ms
Nintendo 3DS: 23 ms
PS Vita: 49 ms
And, to add a tv game console into the mix, apparently the latency between input on a PS3 wireless controller and home screen interaction is also about 50 ms.
http://www.gamasutra.com/view/feature/3725/measuring_respons...