This is a fair point. I read the op's comment as using the former definition. The latter definition wouldn't really apply as this is being determined by standardized testing. Unless one thinks that the standardized tests are overly liberal (their criteria are based on correlations with in-person diagnoses, so it's possible).
Well, it is a legitimate question of how well the standardised tests actually fit the diagnostic criteria for various disorders. [1] argues that the fit between the commonly used standardised tests for ASD and the DSM-5 diagnostic criteria is less than ideal. (And I doubt this finding is unique to ASD, I think it likely if you repeated the authors' exercise for other diagnoses you would get similar results.)
