The percentiles are on the printout the school sent us. It looks like it is from Pearson, who I think makes the test. They were not hand-scored.
It says the percentiles are compared to kids his age who took the test nationally. So for Cricket, you can have 99.9% etc on the OLSAT. My other son got on the Ravens test at 99.1%. You can have a decimal point on some of these test scores.
For the WISC, I was quoting his WISC scores from 3 years ago, from memory. I'd have to look at his subtests to be precise. His GAI was 144 and he was accepted into MENSA on that.
I stand corrected, then. I was going off of what I was told when I was approved to administer the OLSAT, ITBS, SAT-10, & CogAT to homeschoolers. The company that contracted w/ the publishers told me that the tests didn't have the specificity to distinguish beyond straight percentiles and wouldn't give decimals. I've never seen scores like that, but I also haven't tested a lot of kids or a lot of gifted kids!
Re your ds' IQ scores, his FSIQ must have been 130+ as well b/c Mensa won't take the GAI (
http://www.us.mensa.org/join/testscores/qualifyingscores/). I find that silly myself, especially b/c they take a lot of other non-IQ scores but I'm not the one choosing what they take!