You would not be able mention one couple either Amatuer or Professional who got to the top of their tree and only went to one teacher. It just is not possible.
Formation dancing. Very nice to watch and to be a part off. But everybody has to be regimented. There can be no idividual flair. I doubt that if the group went into an Oversway no couple would look any different to the other.If you see what i mean.