There was a time when only silver and bronze medals in three of seven events in a world championships would have been considered a failure for the U.S. The U.S. still has a solid advantage in senior competition because it had that advantage back when today’s seniors were in their prime, while adult competition is closer to an even playing field, especially when you consider individual competition. But for youth, there are plenty of countries and bowlers who can go head-to-head against...