"If the young dont get involved the sport will wither."
There's two different things going on, which we shouldn't confuse.
On the one hand, there are small eltist efforts to train a handfull of athletic young dancers. This is getting a lot of press in top (or near-top) divisions, but it's "you're nobody if you don't start by 15" message is perhaps one of the most harmfull things that has ever happened to ballroom.
On the other hand, there are collegiate type programs involving large numbers of relatively "average" students and younger adults, in a more sustainable and non-elitist approach to ballroom. Also some similar broad based youth programs that are more about participation than cutthrough competition. These are one of the more positive things to happen as they promise a future pool of involved adults at all age levels.