Just to muddy the conversation...

Anti-squat is a big factor in traction, but even more in feel and conditions effect it greatly.
When the rear suspension rises, during squat, that is chassis weight that is NOT being transferred to the tires!
Where it gets confusing is conditions will effect feel, or how traction breaks when and if it does. Less anti-squat will break loose less violently, but generally gives less traction under power and more does the opposite.

Basically on very loose tracks, aggressive anti-squat will help with rotation(unloading off power) and on power traction.
On higher bite tracks less anti-squat will feel more consistent.
This is "usually" how it is used.