Most of my mom's cousins, born in PR or in NY, who moved here ("mainland") married non-Hispanics.
Three of my grandparents born in PR, one in Italy. Though my mom is totally bi-lingual, as are all her cousins in NY, none raised native spanish speaking kids :(
I had to study it in school to talk to my grandparents. So did my second cousins, the Hartleys, the Sullivans, the Riveras, the Anselmos....
And yes, Puerto Ricans are racially mixed; Spaniards, African slaves, natives, etc. I remember my grandmother talking about the rumors of HER grandfather's dalliances with his slaves and running into very dark-skinned puerto ricans in NY with the same last name and from the same towns. Doesn't sound a whole lot different than our southern heritage.
Really? Pass the koolaid sweetheart.