Is there noticeable discrimination against Caribbean Medical school doctors?

The only reason that people go to Caribbean med schools is because they could not get accepted into a US med school, and everyone knows that.

I went to a US school, and know of a few Caribbean grads who seem to be OK as physicians.  I'd think twice before hiring one, though.

Well, if you want an opinion from a non-MD then here it is.  The perception  is that those schools are inferior.  That perception is shared by medical and non-medical people.  Perception can be changed over time.  I would say a doctor from another country always has to prove himself/herself to peers and patients.  Justified or not, unfamiliarity breeds distrust.  
I'm a pharmacist in a teaching hospital.  I see tons of MDs from everywhere  on the globe.  What matters is their knowledge base, skill, ability to learn, work ethic, etc....  

I really have little bias from the medical, non-MD side.

I had one diagnose prostatitis in a female.  They are a bit weak. I don't trust them. So- yes there is a general perception that their training is not up to US standards.  The admission criteria are pretty lax as well, so folks who could never get into a US school get in.