Hello!
I did have an expedite approved in Jamaica for a CR-1. My expedite was approved last August. After I got the approval from NVC, and the file was sent to Kingston, they contacted my husband by phone and myself by email about the medical and the interview. It was VERY quick! 5 days after our file left NVC, we got the interview packet and the interview was two weeks later!
If you have any specific questions about CR1 and Jamaica, feel free to send me a message! Good luck! Things will FLY by from here!