The more gluten people consume during childhood, the greater their risk of developing celiac disease. This according to several studies from Lund University in Sweden:
Lund University: New Research Delimits the Possible Causes of Celiac DiseaseThe amount of gluten that kids eat appears to be more important than the timing of introduction, and whether people are breast-feeding or not.
The current treatment for celiac disease is to stay away from gluten completely. This shows that it could be a good idea to let children eat less gluten, even if they're not intolerant yet. All in order to minimize the risk of developing the condition later on in life.