Actually, you can derive an ABIQ (abbreviated battery IQ) from the two routing subtests. No area scores, though. If the full version of the ABIQ was administered, and not the early childhood version (which I assume was the case, since presumably the tester was aware that he had previously scored in the 99.9th %ile), then you should have been able to obtain a better sense of his ceiling on this, since it is not limited to the seven-year-old level, like the WPPSI. (The WJ cognitive is not limited by age, either.) He had space to continue up into the adult-level items.
