My first encounter with such "gifted" students was in elementary school, they had a class right next to ours. At the time, I never knew about the concept of "gifted students" but what I remember clearly is this: They were constantly bullied for their appearance and mannerisms (ie. very bad dress sense, lack of hygiene, awkward personalities, poor motor skills) fast forward to today, none of these past gifted-students are doing anything special or noteworthy in academia and or the workforce (from my research)
This is just my experience, but perhaps I'm being too harsh.