I don't see how people can defend that interior model shake? It's below amateur (flat out incorrect), and I'm surprised that made it into a Gran Turismo gameplay clip. Older GTs I have do this fine - namely GT5/6 that I own. You don't even see the minute dips in weight transfer from acceleration/braking properly since the "head" viewport is basically immovable. It's just the car model that jiggles and doesn't tie in to the driving outside of suggesting the road surface is uneven.
For stan wars purposes, FM6 has this correct. But this is downright inexcusable for a GT clip. I would hope that it is strictly for the purpose of a trailer and not representative of actual ingame.