A botanist will actually call quinoa a fruit...but then they call water mellon a berry...go figure!!
Quinoa is technicly gluten free however it does contain a protein fraction which extracts in aqueous media that causes a positive Celiac reaction in susceptible individuals. Translation: it can still cause gut problems in many people. it is quite carb dense so anything over a 1/4 cup serving is going to pack a serious insulin response. It is very heavily weighted towards the n-6 fatty acids...the n-3's exist at pretty trivial levels. If i were foing to choose wheat vs quinoa the quinoa would win hands down but like all grain type items the hutritional density is pathetic compared to other paleo type items.
Hope this helps!