When I tried to preorder an iPhone they eliminated the option to pick it up from the store. An employee told me they didn't want hordes of people picking up preorders on the same day. I don't know if that's the reason but it was pretty frustrating.
Having it delivered is risky in several ways. If they try to force you to get it delivered, I think it's better to wait until after the preorder period.
When I tried to preorder an iPhone they eliminated the option to pick it up from the store. An employee told me they didn't want hordes of people picking up preorders on the same day. I don't know if that's the reason but it was pretty frustrating.
Having it delivered is risky in several ways. If they try to force you to get it delivered, I think it's better to wait until after the preorder period.