That's the way I understand it as well. I think about the direction the weight is moving upon entry and the angle that the suspension moves relative. With sweep the motion is slightly more opposing of that weight transfer. As the car begins to settle that angle may allow the load to transfer from outer front to outer rear giving the car better rotation in the center and likewise when one get's back on the power... the angle opposes weight transfer from outer front to inner rear (too much causes the understeer upon exit). That's just what I see in my head. I'm also interested to read others' takes on this as well.