I would rather go up than down to be honest. Proper steep descents on road bikes seem nothing other than lethal to me. Brake pads would melt before you were half way down. If you had disc brakes, they would get super hot and also stop working properly I imagine.
On my first descent of Tourmalet I sat up and put the dynamo on to increase drag, by 2/3rds way down I had serious brake fade and came very close to a tour bus on one of the hairpins