So, Cameron just took the TONI-3. That is, "Test of Non-verbal Intelligence, 3rd edition." Long after I had finished trying to silently figure out the answers, even after I had given up analyzing why the answer that was marked right even made sense, he was still going. He got a standard score of 150, percentile rank of >99, and age equivalent of greater than 17 years, 9 months (it didn't measure any higher than that; it just tells us he's beyond what the test measures).
(Update: His daily note from his teacher today - perfect behavior scores, BTW - said, "He figured out the Fibonacci sequence today. What a mathematician!" Yep, got me again. I had to go look it up.)