Way OT: The reason your "dealer friend" said to not worry about breaking in the car is the motor is cold run in at the factory. This solves many of the issues related to valve seating etc since they run a specific set of liquids in the engines for a set amount of time. Say 12 hours. Then put in the normal liquids, gas it up and run on a dyno. Then put the engine in the chassis and drive it on a test track.

In the old days, you might even find machining shavings in the oil or in other places when you get your car.

As far as breakin for equipment goes. I think there is a definite difference in sound new vs been there for a while. I just turn it all on, leave, and come back 3 days later after trips and it sounds great.