Having done the chain in a half dozen different trips from St Maarten to Barbuda to Grenada I'd agree with those assessments.
On a 36 footer we were almost always the smallest boat in the basin. It was pretty obvious which were the 'permacruisers'.
Mostly Europeans indeed... few Americans, I'd add that aside from the charter Jeanneaus and Benes relatively few mainstream 'production boats' (Sorry Smack
Plenty of catamarans, yes, mostly charter??