I actually believe that any normal person has the capability to be a "prodigy," at least by this definition. Environment often times plays a big role. A child has to discover what he or she is interested in. A child has to have access to that interest. A child has to have the education and resources to pursue that interest. The chances of a child having all these things is rare. Many adults never find what they are good at. A "prodigy" is someone who simply started at a younger age. There is a reason why the best athletes and rappers come out of the inner city. Many of the prodigies on that list found their interest early, and had the opportunity to be educated by someone in that interest. Give it a test. Click on some random names on the list.
Polgar, a Hungarian psychologist, put this theory to the test. Amazingly, it worked. If a genius was truly random genetics, then the chances of him have 3 genius kids is extremely unlikely. Mozart had the rare chance of being interested in music while having a dad who was a composer and a teacher.
A Hmong prodigy is bound to happen. As one generation becomes more educated, the next will have more opportunities.