Knowing that the I-Pace will come to market during the 2nd half of 2018, i'm having a hard time believing an order was placed already, unless you got yourself on to a waiting list, that I can understand. Dealers sometimes start their own list in preparation for the order cues open.
Probably on the dealer waiting list then, those are pretty common when they're coming out with a special model like the I-Pace. Worth the effort depending on how many units each dealership is allocated.
With that being said anyone interested should also check their dealers just to get in early. The last thing you want to find out is that you have to wait 6months or a year extra just because you didn't get in early enough.