I overestimated. I thought DS (6 year old) would be 155+ because there are 2 other family members who scored in that range. His score came in the 140s. He was tested at 4 years. Not DYS material as per that score.
I was also told that he was very chatty during the test and took a long time to get to the point (lower processing speed because of that), did not know how to read some words that were shown to him (he started reading at 4.5 years old), he had an undiagnosed color blindness at that time and he easily says "I don't know" when his attention flags. I am hoping to test him in the next year again to see if the new scores are higher or lower than last time!