per Charlie Perez a AE factory driver, you can read more on
http://www.rc10b4.com/forum/showthread.php?t=32
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Zero degrees of antisquat "Frees Up" the rear end On Power and it also gives you a little more side bite. I like to start with the minimum amount of Antisquat because it gives the rear end the most balanced amount of traction as you enter and exit the corner. It also minimizes wheelies, which are cool to watch, but waste time. The only time that I increase the Antisquat is if I am on a smooth surface track that has limited traction. If I am on a ruff track I always run 0 as it makes it easier for the suspension to soak up the bumps and ruts.
The amount of Antisquat you use depends on the track conditions. If the track is very smooth, more antisquat will give you more forward traction. If the track is bumpy or rutty more antisquat will give you less forward traction