RE #4 -- I always just start the Apple Pay transaction while the cashier is still scanning my items. In fact I do the same when swiping a card. Almost all pay

RE #4 -- I always just start the Apple Pay transaction while the cashier is still scanning my items. In fact I do the same when swiping a card. Almost all payment terminals support collecting your payment information before the clerk has finished tallying up your transaction. Shaves a couple of seconds off the total experience regardless of whether I'm using a card or RFID....