"James
3 hidden stats? you mean 4 :P
Edit - forgot to write their meaning
Discipline - Ability to follow orders & How clean of a driver they are.
Mentality - How they react to orders & being hit by another car.
Initiative - How well they manage their KERS & stay behind a car they are lapping coming up to DRS line.
Error - Ability to control the car when late braking & keep the car on the race line.
forgot to add Braking ability so there is 5 :P
Adaptation - Ability to continue to drive with a damaged car. this list could grow and grow at this rate :D now there's 6
There is no vehicle damage in igp though.