Ron -
IMO, the National GC of Canada has never been worthy of the top spot on that list (or ScoreGolf's for that matter) but falling to 13th, behind the likes of Rocky Crest (4th - really?!?!) and Taboo (6th - REALLY?!?!) is pretty ridiculous.
I liked Coppinwood quite a bit but even among Fazio courses, I don't see how anyone can say it deserves a better ranking than the National.
The National GC of Canada is tough as nails, beats you down like you wouldn't believe and is more about survival than fun but it's a course you'll respect after you're finished.
Sitting at 13th, it is actually underrated now.