Good to know that feedback.
In my head though, there's only so much force going into the road. The higher the force, the deeper the road rash. Take the force it takes to slam a 3x1.5 inch (?) surface into my flesh far enough to allow adjacent skin to touch the road. You get to subtract that force from your road rash. Even if there is adjacent rash, the depth has to be reduced by the RRG.
It would also seem that the easier pavement sliding would help a ton because it won't so easily set you to tumbling.
In the before and after images, the only injury near the guard looked like it was from the guard itself sliding on the skin a bit, and pushing really hard. Were there other locations where he just had a normal 6" patch of road rash, with a 3x1.5" hole in the middle?
From their own marketing footage, it makes a convincing case to me. I figure you get two sets, cover hip, thigh, shoulder, and elbows (with arm coolers).
Of course, I haven't crashed in a race since 1995...