I just bought a Hy/Rd to test out with EBC gold pads (my favorite) and an Ice Tech rotor.
95% of the time the BB7 works fine, but I was again reminded by the Owen's Valley that the BB7 is barely marginal for those kinds of descents. The upper 1/3 of Onion valley, for example, has prolonged 10-12% sections with a repetitive cycle of >45 mph straightaways and hairpins that are maybe 25-30 mph. My confidence was shot to hell with the BB7, on that particular descent.