I believe it is an "old wives tale". The adjustment that correct for "pulling" is "caster" for the most part. Caster is the relationship of the lower ball joint to true vertical. If the low ball joint is forward of the vertical axis, the vehicle is said to have positive caster, and if the lower joint is behind the vertical axis, it is negative caster. I've had old-time mechanics tell me that, long ago, they would adjust caster a little more positive on the right side compared to the left to correct for the drop-off of roads on the right side, which makes sense. Most roads do drop to the right for drainage. Most current passenger vehicles have few adjustments anymore. There will always be a toe-in adjustment, because it accounts for steering wheel angle and affects tire wear the most. Just 1/8" of toe-in misalignment can cause a good deal of tire wear.