I don't think Puerto Rico is a bastion of intactness like other Latin countries. My DP & his 2 brothers, born in a hospital in PR in the 70s, are all circumcised. Their mother was told that they would get cancer if she didn't do it, and of course she didn't want that to happen.
DP is 38, and moved over to the States after college in 1996. He says that he never heard of homebirth, growing up in the city of San Juan. He characterizes the climate around birth & breastfeeding as extremely mainstream, so intactness is definitely not a given there. It may be that the less-urban areas circumcised less frequently then and/or now.
His mom just moved here as well a couple of years ago, and she was pretty surprised by the thought of me not using a hospital to have a baby. She had c-sections with all 3 of her kids. Cesarean rates are sky-high there (45% was the number in 2002!)
Hopefully the rates of circumcision among the younger set are going down just like they are here on the mainland. In the 70s at least, it was just like here.