[autodoctor911]

OK, so the jacking force is not negated, but it's effect of unwanted body/suspension movement is minimized by the other factors. In fact it is the other forces limiting the suspension movement that limit the usefulness of any extra downward force that results, making the overall net downforce due to gravity and mechanical loading to be negative, but the forces themselves are actually minimal, compared to the extra aero downforce afforded by having the mounting points higher. Otherwise, current F1 cars would have traditional geometry with a roll center near ground level.
I wonder if, with the upper and lower arms at a downward angle as now is the case with current F1 cars, do they actually make the lower arms a little shorter than the uppers to get some camber gain, or is there no body roll to speak of anyways, or maybe even negative roll forces, making camber gain in the positive direction(camber loss?) favorable.