Well, as I said, there's also more to look at on Google (which I still have to do). But it is an interesting question what "widespread use" exactly means, when exactly is it that sufficient people have caught up the term? (Because in this case other authors have caught up the term, but (probably) still in reaction to the original authors.)
 Also, I found the  tag. Couldn't this be a better tag, at least for the time being, per the text on WP:N?