We had dd10 tested on the WISC when she was 7. Her GAI came out at 148 and she, honestly, doesn't seem like that high of a kid. She is also 2e, though. A second round on the WISC a year later had a nearly 20 pt drop in the GAI.
I'm not sure either score is accurate. I suspect that she is higher than the second testing and probably lower than the first. She was coming off a really, really bad school year before the 2nd testing where the teacher had stomped her self confidence and her scoring pattern was very erratic with a number of misses on easy questions and correct answers on harder questions (and scores within subtests that ranged from the 25th percentile to the 99.9th).
If your ds was accepted to DYS, I'd expect that you had both achievement and ability scores, though. My dd, while achievement scores on things like the WIAT are much higher than expected if the second IQ scores were accurate, aren't DYS level. Your kiddo may be, like Dottie said, a manageable level of PG or his personality may lend itself toward not appearing radically different than other kids.
I suspect, in my dd's instance, that the 2e issues play into her not appearing as way out there as the IQ #s would make me expect.
