I guess it does, but since it is a computer program it can be coded directly that a car has more or less grip & is conditionally over steered or under steered based on parameters & numerical values that might be a direct input by coding. E.g. in GT5 if we used the GT5 garage editor we could change the grip values directly in the editor regardless of tire compound or weight or downforce or drivetrain.
My main point is the difference here in the coding in a 3d video game that probably has a physics model similar to classical mechanics does not need to have it.
But if it does, then likely most of the parameters like FF, FR, 4WD will play into that GT7 [physics} model, but could also be done otherwise directly. There are at least two different ways of doing this in a computer program while it is not possible in the real world of classical mechanics.
Based on experience from GT5>6>7 whereas if we move the extra added weight of a car it seems PD has model similar to classical mechanics, but if we change the tires on the front of a FF car to RS & rear to SH & we see the change in car behavior it seems to me that some of the mechanics [parameter input} might as well be coded directly without any need to change simulation model of classical mechanics.
So my conclusion on the disagreement which started this, I'm uncertain if PD needs to change the weight distribution like it is on the Peugeot T16 or the 205 GTi even if PD changes the car from FF to 4WD. Perhaps they would code it directly?