Just an update -
I talked to DS's teacher for a while this week about how the year was going for him. It was really a great report. She mentioned how attentive he is in circle time, gave some examples of his giftedness shining a bit, how seriously he takes his classroom chore AND how well he is doing socially. She said that social success was the most surprising to her given the poor report she got from his preschool teacher. She said he is very good at including others and gets along well with everyone in the class.
He claims the one boy still doesn't like him but he said other boys do like him so he doesn't care. I guess this is one of those social lessons that is learned in K.