This is what I was told as well.I have been told that the dealership will get an extra allocation if your order is doing an ED as long as Porsche AG in either Zuffenhausen or Leipzig can accommodate your order (due to only a number of new vehicles can be delivered in a day). Because your order will be considered Porsche AG's allocation instead of the dealer's allocation. That's why one of my buddies also put his order in together with me on 718 Spyder for European delivery.
I think you will have a great chance to get yours. finger crossed!