i've always used discover to order and i get a "ping" to make sure there are funds available, at the time of preorder but then it drops off.... and then when the item ships, i get the full on charge.
(the ping is always immediate, as i can log onto discover and see the pending charge moments after placing the preorder.)
since the discover 5% cash back isn't valid on the watch.... i'm considering using the apple card to keep it active so they don't close the account on me. i'll decide before tomorrow night which card it's going to be!