Okay, I have the X Performance (Taiwanese Dual model) in the US. I noticed there are two touchscreen issues... the upper part of my screen doesn't register at times (tapping widgets, swiping away notifications). Not all the time, just randomly. The other problem is when I'm gesture typing (Swiftkey or Google Keyboard) sometimes the gesture trail will cut off mid-trail causing errors while typing. I find if i turn off the screen and on again it works well. I already tried a factory reset and both issues persist.