Hi AlanWBaker;
This is nothing more than just my (Opinion) but I have over the yrs. owned alot of extremely fast cars like the M Series BMW's, AMG Mercedes, Turbo 911 & 930 Turbo Porsche's, Z06 Vettes, SS Camaro's, Saleen Supercharged Mustangs, Audi Turbo S4 and I think you get the idea, Right? To the point, if a person is not driving probably over say 130MPH plus I really doubt that a rear spoiler on anything truly makes a difference. As you know they are suppose to add down-force and keep the rear end pushed down on it's suspension to not let the car wonder around on the road, so if your not driving at really fast speeds and I don't see how anyone is going to be able to do that with traffic being the way it is today, a rear spoiler is (Probably) more for looks. (IMO)

Terry

BTW; Nothing wrong with that though, I like the way they look personally: