I do like glance and it suit perfectly to my needs, like ,,tap to wake" but i use only glance. Tap to wake seem wasting my battery (1520). Sure, nice features but Nok..MS need to optimise it even more.
I use double-tap-to-wake sort of off and on in my daily life. A lot depends on grip and can I reach the Power button easily. Usually when I'm multitasking and need to get the phone ready while finishing something with the other hand.
I do LOVE double-tap-to-wake when I'm in the car and using nav and I have a loooong stretch on a road and I've turned the screen off to help the charging along. In the car mount scenario I think double-tap-to-wake becomes a fantastic tool and I'm dying for it's sibling to arrive with Update 2; double-tap-nav bar-to-sleep. That combo is must have for car mounted application, IMHO.
LOLz really that is another thread and maybe another poll?