[landtuna]

Your reference says that's an "Urban Place" and that "Urban Areas" are bigger. The post you responded to linked to something that said 220 million live in 486 "urbanized areas". Since there are many more than 486 towns above 2500 people, I think the 80% number refers to "Urban Places" and not "Urban Areas."

EDIT - it seems the number of what we'd normally call urban is around 70% with about 10% in "Urbanized Clusters" which seem to be "Urban Places" that we think of as suburbs??