I can post a link later when I'm at a computer not a phone, but the CogAT doesn't claim to be an intelligence or IQ test. It is more designed as a test of a child's likelihood of fitting well in school in terms of his likelihood of being a high achiever b/c he has mastered the skills that predict school success. I mention this for two reasons:
1) You won't get a definitive answer on intellectual giftedness from the CogAT although the SAS # you were given does correlate with IQ for some people much the way older versions of the SAT did.
2) The unusually high number of kids in your local area who scored so highly tells me that either you've got a lot of high achievers locally and possibly more gifted kids than typical or that there is a lot of prepping going on for this test in your schools or privately by parents.
