planning defies ranking
I suspect these rankings aren't terribly accurate. For one thing, Gourman comes out only once every few years. For another, planning as a field resists ranking. Numerous planning professionals have told me that if your goal is to work locally, in a particular region, in local government or privately, in a specific region, your best bet is probably the closest good accredited state program. Their alums and community contacts will have the best connections in that particular region.
This being said, I think there's a handful of international-profile programs (Berkeley, MIT, maybe Penn, plus a handful of functionally specialized programs like Harvard GSD and KSG, respectively, USC or Cal Poly, that serve as magnets for people who want to get specialized planning credentials in one aspect of practice or another). These programs would probably be helpful to you if your goal is to get consulting, real estate and international development agency positions, or specialized positions through joint degrees in areas like project management, environmental engineering/design, urban design, architecture, conflict management or transportation.