Some of my closest friends in elementary school fell into the above-average + introverted group. To teachers they stood out like sore thumbs. To those of us with similar interests and abilities, but more extroverted, they were just kids who double checked their answers before blurting them out.
In an age where there is a tendency toward pills and therapy as solutions for almost anything (not trying to spawn a pharmaceuticals debate), articles like this feel like a breath of fresh air. Being intelligent does not a disorder make.