In all my life and I am 77 years old and have bought many vehicles. I have never ever heard of brakes that do not work because they are not broken in. To me that is a company waiting for a law suit on them for not preparing the vehicle to be safe with good brakes right out of the dealership. A person that buys a new trailer or motor home is expecting good brakes from the start and if he/she got into an accident because of no brakes because of a glaze as somebody described calls for a multi million dollar law suit.
2002 Gulf Stream Scenic Cruiser
2018 Buick Envision Essence
Neway Freightliner chassis
Aventa II Blue Ox