This is where a conversation with the school psych and a full report can come in handy.
For each score, there is a range of statistical probabilities called the confidence interval. A 90% confidence interval means that if we were crazy enough to give this poor kid the same test on 10 different days, we would expect 9 of the scores to fall in this range. It is certainly possible that some of the scores have a confidence interval that pokes out into the superior range.
And yeah, a behavioral description can help you forecast how accurate those scores are. ADHD, anxiety (and ho boy! Autism!) can definitely affect scores. It is not uncommon for an assessor to write right into the report, "These scores should be interpreted with caution," if they think there really is some reason why the student's performance did not come anywhere near their potential.
Also, verbal ability is really privileged in school. It's not difficult to believe that a superior verbal ability gives off the impression of superior overall ability.
