This +1
Also, the figures in your example are not only wrong, they are quite misleading as you are using static CoF in a transiet and dynamic example IE a Race car doing laps.
Further, the GT-R differs from Normal AWD systems in that it is not consistently reducing the traction circle of the front wheels as it is a variable system (Closed loop control system)
Hence front torque is transferred only when traction becomes an issue IE corner exit.
I have seen Mark Skaife comment that the 32 was one of if the not best car on turn in corner entry he has driven, this goes against everything the "experts" on this forum and abroad like to spruik about.
Also,
Grip as you speak of it is generally thought of as the tractive effort of the Tyre with the CoF being something which is completely different (CoF being dimensionless multiplier)
This is actually an important mathematical distinction.
And yes, we could probably bottle the tears of the baby jesus with this thread.