German World Domination

In luge:

Since the addition of luge in the 1964 Winter Games, German athletes have won 75 of the 129 medals awarded for it, and 31 of luge's 44 gold medals. In the singles events, a German man or woman has taken home 20 out of the 30 combined Olympic titles. This year, Germany took home the gold in all four events, its eighth Olympic sweep in the sport. Tobias Arlt, who won this year's doubles gold medal with his teammate Tobias Wendl, told reporters after their victory, "Germany is on top of the world in luge. It's our sport."
So why are Germans so much better at it than everyone else?
The legendary German slider Georg Hackl, who won three gold and two silver Olympic medals in luge in the 1990s, attributes the dominance to Germany's emphasis on youth recruitment. "There is a very selective process of recruitment of athletes who have the ideal measurements and body weight," he said. "In the junior programs they focus on selecting athletes for their body structure." But the focus on Vorsprung durch Technik—advancement through technology—also plays a role. German sliders perpetually refine their aerodynamics and their sleds to shave off vital tenths of a second.
Some competitors are suspicious of the country's success. "The Germans dominate, [but] in all the inspection commissions they are getting around the rules a bit," claimed Valery Silakov, Russian's Olympic luge coach, in 2012. "But how can you fight it? They all live in the luge Mecca of Königssee, where you have the German luge and bobsleigh federation and the International Luge Federation. They've all known each other for decades." German luge officials categorically deny these accusations.

When do lugers start focusing on the sport in the U.S.?  I can't believe too many people are getting into it prior to their teens.  And recruiting?  I can't imagine anybody scouring the country looking for lugers.  My guess is that most of them come from areas near former Olympic sites, like Lake Placid and Salt Lake City. But I always thought it would be an awesome sport to get into.