[Christ]

I dont' think anyone ever had a question regarding the benefits of lift, negative or positive in nature. The question that commonly comes into play is that for all intents and purposes, any designed lift in a shape increases it's Cd.. which means that it takes more power to do the same work against wind resistance. Negative lift puts pressure on the tires which increases rolling resistance, and stresses the drivetrain more.

We're trying to be more efficient, not worry about whether or not the car, which is already designed to stay on the ground, is going to stay on the ground.