That's fascinating to me, because many times I've tried to do that it's an exercise in frustration. Terminals don't always have the sensor in the same spot, phones sometimes don't register the connection, and so on. Maybe things work better in the UK?
It can be a bit difficult, particularly now that some phones are getting more demanding about re-authorising before it will go through. Tap-try to get fingerprint scanner working-tap again is a much less fluid procedure than tap-go.
The position thing is just something you get used to. There's not that many reader models in active use and most of them are pretty good about marking where the nfc reader is these days.
