Since the mid-90's, Australia, Ireland and UK, sprouted many 4yr (grad) programs, many from their traditional 6yr systems, and various other isolated grad schools formed (plus more started in the Caribbean), partly to soak up the extra US applicants at the time ($), partly in recognition of the benefits that older, 2nd-career students (college grads) give to medicine in the English system, and in some cases (e.g., Flinders in Aus. if I recall correctly) to help reduce domestic applicants by request of the govt. while saving the schools from bankruptcy. Because many of these were offshoots of established 6yr programs, they escaped much of the stigma factor (plus they benefit from not being seen as "Caribbean resorts/playgrounds", another original indictment against the Carib schools, since most Americans know the islands only as a tourist destination).
-Pitman