Well, don't worry about the service portion. Nissan has specific details on the GT-R. Read from Automotive News which is a newspaper that dealerships use and is like the Wallstreet Journal of the automotive world.

No GT-R's will be sold on the phone, only off the floor. Any GT-R buyer must be greeted by the manager and general manager. In order to qualify as a store that can sell the GT-R, you must invest $25,000 in an alignment machine that is specific to that car only. There are other special tooling that are required, all must be covered by that store. There are certain procedures for dealing with any GT-R customer both on the phone and in the store, and the managers are directly responsible. The ace technician from service will go to a 1 week course for the GT-R, which if you think about it, is also a big investment on the dealership to lose their best person for a week. Nissan actually wanted them in Japan for 4 weeks initially, but settled on 1 week. That will be the ONLY technician who can touch the GT-R, nobody else. If that technician is on vacation, sick, or not at work the day a GT-R is brought in, Nissan North America will immediately dispatch a qualified tech to that facility.

So there is major training for the technician who will touch the car, and major training for the contact people, and I can only imagine the surveys and attention from Nissan themselves. In the words of the article, Nissan will be sure to treat the GT-R buyer as someone exclusive. Oh, and the engine requires adjustments every year, all covered under warranty. I have no doubt they will take care of GT-R buyers, and any dealership that is stupid enough to cut corners...well, Nissan is having an audit to every store signed up. You don't conform, you don't get the car.