While I agree, even that view isn't universal. Within the NGAA, Shodan is assumed to be much further along than that (it's the first "instructor" rank). Of course, in BJJ, they've clearly decided someone who has just gotten the basics isn't going to be a BB.This is the Japanese view of shodan (first degree black belt) as espoused by a number of senior level Japanese martial arts instructors that I have discussed this with in the past. Shodan indicates that a proponent has learned the basics of the art, and can now begin learning the underlying and more advanced principles. Prior to that, he is a beginner and is trying to just to learn the basics.
Some arts take longer than others to learn the basics. There are a few that have very simple basics and so it is very easy to attain shodan. This is why a black belt only has meaning within the school or organization that granted it. People outside the organization generally don't understand what the basics entail, and so have no real idea of any black belt's knowledge or proficiency.