http://www.sciencedaily.com/releases/2012/08/120806151405.htm

Caveat: I haven't read the study. But this finding is in line with similar recent findings.

" "The important factor was being able to focus and persist. Someone can be brilliant, but that doesn't necessarily mean they can focus when they need to and finish a task or job.""

What strikes me here is that if we don't give GT kids challenges they won't learn how to "focus and persist."