Easy solution: turn on 'high sensitivity' for your touch screen (which is nice because it also allows you to use your phone while you wear gloves). I turned that on and have found 'double tap to awake' to be really responsive. The trick is that you don't have to tap it that hard at all. Just two light, quick taps anywhere on the screen will consistently wake it up, no problem. I use double tap exclusively now. I only use the power button in the reverse situation: to turn the screen off.
Always has been on. I have no issue with tap sensitvity at all once in use.