Ah, anti-'s. One of the most well worn topics of internet debate. Anti-'s are nothing more than net vertical forces of suspension members that influence some particular vehicle motion. Anti-dive, anti-squat, pro-dive, pro-squat are all words to describe the suspension's effect on pitch due to the geometrical setup. I calculate anti's as a percentage of the net vertical force generated at one end of the car by the suspension links compared to the longitudinal load transfer caused solely by the longitudinal contact patch forces at that same end of the car. Anti's only occur when you have forces at the contact patch. Some people calculate the anti's in a little different fashion, but I feel it's unnecessary.
Furthermore, I dislike large amounts of anti's unless there is a specific need that can be addressed. Anti's load suspension linkages, reduce load transfer that is tunable, and in general increase tire normal load variation (the #1 thing to always avoid). IMO, utilizing anti's should simply be a last resort.
Having said this, this is exactly why that X-link suspension isn't a great idea. It has loads of lateral anti's and super steep n-lines. The parameters they are chasing with that suspension are not parameters that need altering in the fashion they speak of. They're obviously in the business of trying to make money, period. Piles of camber change, loads of jacking forces, n-lines through the roof, attention to roll center and roll center migration..... all things a good suspension does not need.