Don't know what this means, could mean a lot of things.
Might be that professionals don't think of aspergers when they have a black client. Just like it is often missed in women. Might be that black society is a better place to function in as an aspie, and therefor that aspies become less visible.
Might be that all the places we meet, internet or other places, are just not where most black aspies will go.
There will probably be a cultural component, one that might affect visibility, and bias of professionals.
It is worth looking into it. But question will be, how to do that. Having a poll on Gestalt will make no sense.
Some groups get specific diagnoses, seems lots of young maroccan men here get the dx schizophrenia. Might be that that could cause misdiagnosing autism, because a professional will think of schizophrenia first.
I would not be amazed if bias from professionals would cause missing out on asperger in some groups of people. As soon as there is a language barrier that could already be the case. And lots of traits will show different in a different culture.
And I do not really trust professionals to be unbiased and open.
The article is interesting because of all the questions it raises.