Only the high end Yamahas, the Japanese ones i think, definitely not the low end, but i would imagine after a couple of dozen gigs any bass will be in the same zone.
From the Yamaha website
Any bass benefits from being "played in," a process in which the instrument matures and opens up as the stresses between the wood and finish, neck and fingerboard, and body and hardware are released, resulting in better sound and playability.
Yamaha’s exclusive Initial Response Acceleration (IRA) technology releases those stresses by applying specific vibrations to the completed instruments as part of the crafting process and gives a "played in" bass from day one