I'm not aware of any organization that 'ranks' PRS training programs...fortunately, there is a responsible governing body that accredits these programs, and reviews them frequently...but the RRC and ASPS certainly don't rank them. US News and World Reports did'nt include PRS training programs in their recent annual guide to colleges and universities. Perhaps by watching a few re-runs of Extreme Makeover, The Swan and Dr 90210, the OP could form a rough rank-list based on where all of the featured master-surgeons did their training.
TNS