I'm not sure what that means "misfire". You mean I am holding the phone in my hand with the display off and **almost** touching it, but not quite, and it turns on? No, I haven't noticed that. You mean that the phone turns the display on when it is sitting on a table and I am not raising it? The only time I have noticed the display come on in a circumstance like that is when I receive a notification. You mean I raise the phone and it doesn't turn on? Maybe once or twice, but a quick tap fixes that.
You mention tapping with a palm, but that just isn't a use case for me. I just don't accidentally tap the phone when I am holding it. And, really, I would expect that any tap with something capacitive, whether a single finger or back of a hand, should wake the phone when it is tapped.
By misfire, I mean grabbing it, carrying it around, sometimes touching the screen (I don't see how that can always be avoided), and then the screen sometimes turning on, after mis-interpreting a touch as a tap.
Yes, a TAP should wake the phone, but not a TOUCH, when carrying it around. Like I said, I had 2 Xes, and on both I had these misfires. When picking it up from the desktop, pulling it out of my pocket etc.
Also, why do Android phones never behave like that? I tried the latest Android Blackberries, a Nokia 8 (I think it was), and they all were very capable of telling a touch of the screen from a (double) tap to wake it. Not once a screen turned on without me wanting it.
To get this right: I'm not saying the X-screen turns on ALWAYS when it gets touched. I would say, in 1 out of 3 cases. Therefore, for me, this feature seems to be too sensitive, compared to other (better) implementations that I know of.