I think the data we have suggests that the biggest reason they are producing more successful kids is because because they are starting with more kids entering ballroom in the first place, due to fewer cultural prejudices against dance in favor of team sports. It's not an issue of their doing better with the kids they have; it's an issue of their having more kids in the first place.
With four years of additional data, my opinion on this has shifted. I no longer think they are starting with more kids. I think they are doing a better job of getting those kids partnered up.
For example, YouTube has shown me half a dozen channels that started out featuring a junior (
sensu lato, that is, juvenile, junior, or youth) girl’s ballroom dancing. In every case, the girl has picked up a partner in six months or so, switching from posting solo videos to couples videos.
Watching backgrounds for other dancers, it’s not the case that all the girls get partners. Rather, girls that have their own YouTube channels are drawn from the top five or ten percent of the female dancers, and girls in this top five or ten percent get partners. So I think the way it must work is, when a boy enters the system, he instantly gets paired up with the top available height and age matched girl. (I never see unpaired boys in the backgrounds, like I do in, say, ballet class backgrounds or US rounds. And the boys that do get paired up are mediocre compared to the girls they get paired with.)
Meanwhile, there are plenty of junior girls in US classes as well, and few boys for the cultural reasons discussed upthread. But, even the boys which are available don’t get paired up.
Instead, at most studios when one of the girls shows enough seriousness to do more than group classes, amateur or professional instructors swoop in to take their (parents’) money for teacher-student or pro-am lessons. At studios where this does not happen, the girls typically claim not to want a partner, and the studio signs them up for solo stars instead, instead of convincing them to take on a partner.
Do I sound Frustrated? I am. If I spoke Ukrainian, I’d be ready to work out a deal with a Ukrainian studio to take my boys there for tryouts, and offer TPS visa sponsorship to the winning partners/parents.
What’s needed for the US is to figure out a business model that lets the pros and studios make as much money off junior couples as they do off pro-am.