I felt touch point is little bit weird on iPhone5 device. I ran test-cpp on iPhone5.
And I felt this weird touch point phenomenon with Extentions Test > UISlider Test.
I should touch little bit below of control to move slider handle.
So, I made simple test code and ran it on iPhone5.
https://github.com/pyrasis/cocos2d-x/commit/1b928b5ed69c50d491cbd2200e29364ad799c724 (TouchPointTest branch)
this code draws cross line at touched point when the screen is touched.
I can't touch specific area as attached images. I tried to touch edge of the screen(top, bottom, left, right) many times.
I can't touch to draw lines in red rect.
It's fine with iOS simulator.
IMG_1891.PNG (91.3 KB)
IMG_1892.PNG (101.4 KB)
touchpoint.png (53.8 KB)