Thank you very much for the reply:-), I just checked with the school and the scores are percentiles on the general norms.
I totally appreciate your point that it could be because my son has newly arrived in the country.

He made the gifted cutoff anyways as one of his scores is over 95th percentile. And as he made the cut-off, the school recommends him to take an IQ test soon. But we are relocating soon and the new school will be using a CogAT screener for kindergartners. I hope that gives me a better picture of his reasoning abilities.