Why don't Specialized specify what angle these grips are supposed to be at?

If it's all so scientific, presumably they work in a specific way. They are very obviously profiled so it's not like it doesn't matter. I've had mine at all kinds of angles - down so the palm presses flat on them, up so the long axis is in line with my forearm ... and everything in between - and they still don't consistently stop numbness like the "old" BG grips did on my last bike.