Are you reintroducing her in order to get more testing done?
It's probably a good sign that she has reacted minimally to some exposure. I know that my dd reacts very quickly to any gluten exposure.... We also have a strong history of celiac disease in my family and those with celiac also react strongly and immediately to exposure.
However, I also agree to not celebrate too early.
Because everyone's reactions are different.
If you're reintroducing in order for testing, how long does she need to be on it until you can move forward with that?