Especially when the legs of the race have likely been planned before the contestants have been selected.
I also think that the eventual winners were given a harder time on the chinese restaurant challenge than the two girls were. They didn't finish that challenge before the people who had the foot massage finished theirs. In other words, the ability to speak the language in a challenge designed around speaking the local language did not have a dramatic effect on the outcome of the challenge.
Ordinarily he was insane, but he had lucid moments when he was merely stupid.