That
must be understood in the context of the number of applicants to U.S. residency programs from Caribbean medical schools (which are well-known to be a little predatory).
From that article you cited: International medical graduates in particular have low match rates for residency programs. American medical students have a 94 percent match rate, according to the Times, which cites information from the National Resident Matching Program. However, Americans who study at international medical schools have a match rate of 61 percent."
Kids from the U.S. get sold on a Caribbean M.D. school, and spend thousands and thousands of dollars only to find out that things get really complicated when it comes time to do clerkship rotations or apply to residency.
An M.D. or a D.O. from a school on U.S. soil is definitely not useless, and your chances at matching a residency are extremely high, as cited above.
