Hah! Dave beat me to the FR500S data post. +1 to what he said about it, and I'll add one small observation (maybe two).
First, just to reinforce, look at the 80mph data. You're seeing a mild amount of LIFT on the front and about 50 lbs of downforce at the rear. We all know how significant 50 lbs is in the winter, when we (used to?) throw bags of whatever in the trunk to help us in the snow. Still, you don't see the real payoffs until the 120 mph data comes in.
Second, notice the front again. Even at 120 mph what you're seeing there is basically a neutral situation (canceling out of lift/downforce). I'm interpreting this in two ways. One: the actual device up front (in this case a genuine full-size front splitter) is (on it's own) likely providing more downforce than shown, but you don't get a measurement of it because its real function is counteracting the cantilever effect of the rear wing. Two: the device up front is not the air dam/chin spoiler, but the full front splitter, which provides its magic according to the Bernoulli principle. Punchline: a little front chin spoiler as is so frequently marketed and put on our cars is not going to provide squat in terms of aero efficiency. It does, however, help you move the air around to places of your preference - like funnel it into the radiator/intercooler area and a bit further around the front tires.
I would like to see data on hood vents and maybe functional fender ducts. Killing two birds with one stone is always nice...even if the other bird is just a hatchling (read: I suspect that the cooling advantage is likely the big bird).
Last note: AJ's "shoebox" observation is probably right on. The FR500S is pretty damn bad, but the baddest of the bad (in our basic body, since we're only talking aero here) are the Speed World Challenge Mustangs. Look at all they did to the body, full front splitter, rear wing, side skirts, (I'm betting) full belly pan, diffuser, hood vents, but no canards or vortex generators. Add to this the super-wide body kit and its ultra-low stance, and you have the makings of almost all we can do with our shoeboxes.
Best,
-j