Can’t let that go unanswered thomthumb, MM’s hubby isn’t suffering from bad technique, if you seriously think that 160mm rotors are adequate for most people then why do gravity riders use larger ones, can’t help thinking there’s more to it than technique!?
I rode the wall with him yesterday and there were a couple of bits on the descent where he couldn’t stop as quickly as he would have liked, and no his rear wheels wasn’t skidding, there simply isn’t enough friction being produced by the brakes to slow him down. This also makes me think his technique is good as he isn’t causing the wheels to lock up.