If it was an option, to save time or something if I was racing an FF, I think 3/4 of my stops would only change the front tyres.. unless I had alot (or in most cases, all) of my brake bias at the back (Usually a thing I do to relieve some of the pressure on the front.)
Would it be fair to say, that in theory, 4 Wheel-drive cars with a rear engine (Porsche 911 4S or whatever[Yes, I know this car isn't in the game]) would show the most consistent, most even tyre wear? Extra weight on the back adding stress vs. front wheels turning, thus adding stress.
Edit: I'd say FR is the best for tyre wear, as FF's get a TON of stress on the fronts. And if the tyres that you steer with are doing horrible, your ability to turn will drop drastically, in addition to the fact that high-speed turns in FF's are hard without a bunch of differential trickery...