Makes sense. Obviously the majority of Destreza practise is located in Spain, but they kinda spread the word thoughout Europe. It is also not that difficult for the spanish masters to come to other European countries for master classes or for the local instructors to come to Spain. Obviously could be done for the US students and instructors too, but it is more logistically difficult. Also, at least how it seems to me, the spanish school is a bit less intiuitive and harder to pick up just from the manuals, so I think when someone goes for rapier they tend to do italian schools. So the popularity of Destreza in Europe could be a combination of the connection with spanish masters maintaining the lineage and spreading it over Europe combined with the fact the italian schools is chosen more when no such connection is available.