Every car has body roll... I doubt they meant the car is on blocks and doesnt give any, but im sure there is considerably less roll with springs being so much stiffer, both front and rear. Think about this: Youre jumping on a trampoline. it gives when you come back down, to give you spring for when you go back up. if it didnt, youd crumble, like landing on concrete after a 10' drop. Apply this idea horizontally, not vertically. no body roll and the WHOLE car would roll left if you're turning right, and right if turning left. the body roll is acting in the same sense as your trampoline, having some "give" so you dont "crumble" or flip the whole car in this case. correct?