If that's an actual test question, you should probably edit it out since the actual questions are supposed to be kept confidential. My dd10, too, has much lower comprehension scores than the other two indices on VCI. Both times she was tested, her other two VCI scores were 18/18 and 17/19, but comp was 15 once and 12 the other time, if I recall correctly.

From what the psychs who tested dd said, she had some atypical ways of interpreting the questions that didn't show lack of comprehension of social situations, per se, but certainly weren't what the person who wrote the test was looking for.

In the example you gave, I don't know that I'd take that type of a response as a sign of sheltering. It may just be uneven development, it could be an issue with social comprehension (such as Aspergers although I'd be loathe to consider that without significant other indicators), or it could be a variety of other reasons.

Do you have enough other kids in his age range to compare him to to see if he really seems to be socially sheltered beyond the norm? Do you know anyone else with a child his age who would be honest with you if you asked?