I find that it is virtually impossible to double click from the lock screen to open wallet and make a payment using a iPhone 6s and iOS 10.
If can remember to shift my thumb and use the edge of the thumbnail to double click the home button then all is good. On the other hand, I find myself fumbling on paying at a checkout, unlocking and relocking several times.
The problem appears to be that with iOS 10 as soon as your thumb hits the home button the phone gets unlocked. Yet double clicking home to open wallet must be done from the locked state.
Is there a better way to deal with opening wallet while standing in a checkout line? Or do I need to teach myself in that case to double click with my thumbnail instead of thumb print?