Gah, sorry for the rant. But I agree with the original poster. I think this sort of introduction should be more like: "This is George everyone, his son is Daniel -- he and Mary met at soccer camp last summer."
Over time, though, the activities of children become more differentiated by IQ. For example, my eldest son has attended contest math programs in the summer and this year is taking Sunday classes at MIT. It becomes more difficult to say what children are up to without providing indirect information about IQ.
