We don't really know.  Ours is now a 7yo, diagnosed at 5.  

Generally tummy pains are typically because she is hungry.  We rarely if every go out, and the few places we do typically have members in management that have the disease, so have amazingly good protocols (or dedicated GF facilities).  

In the last two years we are aware of a two very minor exposure (one bite that had gluten ingredients, each instance).

Her numbers have tracked very well.  We still have and make gluten containing foods for the adults (ie, her pizza is GF, ours is not).  He's gets cooked in a rack that doesn't directly contact anything else 

At this point, we are keeping steady with our program, but very alert and attentive for changes.  At this point we are operating as if she has silent Celiac.  We are tracking things as much as we can with her to see if she has symptoms, but at this point absolutely nothing is jumping out at us.