I'll probably ask in the road forum as well, but I thought I'd start here, because Cs & As tend to have a lot of inertia for the brakes to overcome. I know I'm not the only person in here who rides in the mountains, at least sometimes.
The reason I ask is that I'll probably be getting a set of wheels in the next couple months, and I'd like to learn what I can before I decide which ones. Disc brakes aren't an option. I've heard horror stories about long descents, and it's never happened to me.
If it's happened to you, what did it take?