Hi littleneil. While it is creative answer that you were given by your Dealership, a Priority Code of 19 is not a "regional thing". It was what they chose to give your order.
As has been previously described, a Priority Code of 19 is the lowest priority that a Dealer can assign one of its factory orders. Region had/has nothing to do with it.
And just as an FYI...We can walk into virtually all Lincoln Dealerships and see "Lincoln Presidents Award" plaques. So we should not count on that as a factor in getting a vehicle sooner.

Dealer allocation, the number of Dealer orders for that particular vehicle, Priority Code, parts/commodity and scheduling constraints etc. are the factors which affect scheduling and production.
Not trying to be a negative nelly here, only making the information known so we all can make informed decisions...despite the *creative* answers some Dealership personnel may give us.
Also, on a related note...Everyone should keep this in mind: Some people feel that it is better to order from a larger/high volume Dealer because they will have a larger vehicle allocation. However, that is only partly true.
While a larger Dealer will have a larger vehicle allocation, your order will also (or may also) be fighting with more orders from other customers (large volume Dealer=more orders from more customers).
On the other hand, a small volume Dealer will generally be just the opposite. Less vehicle allocation, but as the customer, we are also (or may also) be battling against less orders, since they are lower volume.
Essentially, there is no way to accurately determine what any particular Dealer's vehicle allocation is, or how many other orders our order may be jockeying for position with at that Dealership.
Therefore, in my experience/opinion, it is best to simply take pricing, Service Department competency, and driving distance to the Dealership into consideration when choosing a Dealership to order from, as opposed to Dealer size/perceived allocation.
Hope this information may help someone at some time, everyone gets their vehicles as soon as possible, and good luck.