I dial mine in to acount for the crown of the road and still go straight. Without that consideration, a properly aligned car would have a slight right tendency due to the crown of the road. Unfortunately the Pros have no caster adjustment to correct a steering pull tendency.
If the steering wheel is simply cocked to one side or the other when going straight, but the car doesn't pull either way, its only a toe in adjustment. I've found that my P5 has a hard time keeping the toe in adjustment, and think the tie rod end ball joints are wearing.
I just wanted to point out that there is a significant difference between "pulling to the right" and the steering wheel being misaligned due to toe in.