I'd assumed that coeliacs wouldn't be so silly as to set foot in the place.

It makes sense when you think about it though - with pizza and pasta, the gluten is all in one big lump and easy to replace with a gluten-free substitute. With Asian and East Asian food, on the other hand, there will only be a little bit in a powdered spice, or in soy sauce - most non-coeliacs would think it insignificant, and in any case it's much harder to spot and rectify.