What is it you imagine Gladwell's "claim" to be?
Because he's repudiated the idea that he or any other informed researcher claimed 10,000 hours was some magic number, or that practice alone is a substitute for talent: http://www.newyorker.com/news/sporting-scene/complexity-and-...
It would have been more accurate to say "It will be interesting to see how well a gross mischaracterisation of Gladwell's claim stands up to empirical testing".