The more antisquat you have, the more the front end will be lifting under acceleration! Very good for 2wd cars, but on a 4wd it will "only" take away front grip. This will give the feeling of having more rear traction, but you actually only have less steering and less front drive (on power)
This is how I feelt anyway after testing it at last years Euros track in Denmark.
If I have problems with putting the power down I will increase rear toe-inn and/or move the shocks out on the tower as this will give more forward traction!