I couldn't find anywhere in the article where it gave an amount of the short position. Did this guy bet the farm on it? If so, he deserves praise (and the returns) for his insight. If, on the other hand, this was just one of dozens (or hundreds) of small short positions his fund invested in, then not so much.
Anyone can bet small amounts all over the roulette table and then only tell their friends about the ones that won while ignoring all the ones that lost.