Is bold-ed part common in US? Because I've bought fair chunk of new cars, and I've never, ever had opportunity to drive specific (new) car that I would buy. Dealer typically maintain one or two demo cars, and there is no way the'll let you put any km on brand new, never touched car.
Yes, in the US most dealers have 100s of cars on their lot in various colors/configurations, you go through and pick the one you think you would like, take it for a test drive, and if you like it, and can afford it, you can purchase it on the spot and take it home.
Very few people custom order a car. (Other than a Tesla of course.)