I think the point of discussion is a matter of terminology. Ian Stewart-Koster www.aussieheavyhorses.com writes the following:
"The Clydesdale stands 'close behind' and that is a breed feature which is notably different to the fault "cow hocked". A cow hocked horse has hocks close-almost touching, and hooves far apart, and cannon bones that are angled from the hock to the hoof.
The 'close behind' attribute of the Clydesdale is such that the hocks are close, but so are the hind hooves, and the cannon bones are vertical and parallel and perpendicular to the ground."