Only for the constructor and not the riders, how can that be right? the commentators were saying that there are no dimensional advantage and therefor they haven't benefited, but if the original valves would have caused engine failure then the advantage is from reliability, I think this is why Yamaha haven't appealed.
Also if the engines are sealed, why wasn't the broken seal picked up, did Yamaha try to hide the fact they had been in the engine?