I have a DS5 who we suspect is gifted but hasn't been tested. The one thing he has beyond all things is a thirst for learning and high motivation. Whether he tests gifted eventually or not...i believe smart + highly motivated is often an easier road than gifted+ laid back/complacent/or terrified to take risks due to fear of failure.

I have a nephew who tested gifted as a youngster and barely passed tenth grade...and his sister tested high averageand got straight As in 8th grade this year.