It is possible that he is "twice exceptional" and there is a disabiltiy that is depressing his IQ scores in certain areas. DS was tested at age 3 and then at age 6 (not for giftedness, but because of other concerns). He wasn't exactly cooperative at age 3 but his IQ was in the average range. At that time, his language was somewhat delayed. He could whip together a puzzle, easily, but was not doing much in terms of conversations. I think his verbal IQ was in the low average range and non-verbal was above average (so it averaged out to average). Fast forward 3 years and he was tested again. His scores had shifted way up and his IQ was around 130. At around age 4-5 he made a lot of gains with speech, and that was reflected in the higher scores. DS has developmental coordination disorder/developmental dyspraxia which caused the delays with his speech. Your DS could have something similar going on. Autism Spectrum Disorder also can cause problems with conversational speech. I think it would be a good idea to take him to a neuropsychologist and find out areas of strengths and weakness, and whether there is a disability involved, or simply a delay. We had testing done at a major university with both kids.
