That's not a diagnosis. It would not be counted by anyone as a diagnosis. That was her opinion.
I see plenty of kids that send off alarm bells (and no I don't say anything) but that's my opinion, not a diagnosis, sometimes they do emerge years later with a diagnosis, but that's an entirely different thing from my (or anyone else's) non-assessment opinion.
That's why the article was so daft. Teachers refer kds they're concerned about (as they should). Professionals find that some of them don't meet the criteria for a dx.
I did sit in a meeting with a pead who was concerned about the number of children she was seeing who she couldn't diagnose. In her view these were children who needed help, who had 'something' but didn't tick all the boxes for a dx and therefore would be left without help.
Diagnostis criteria do change, but the criteria are pretty strict and in the UK over dx is not a problem- delays in getting one are.