Yes - because of RN- we really can't build "too light".
Most kits on the market for under 1000 sq in models are simply flying stones- exception being the better 3D models which are built like old Wakefield rubber band models.
really desireable wing loadings of these would be under 25 oz sq ft
on the smaller ones - down to 14 oz is still not too light.
The guys have to fly em fast to keep em from stalling/snapping.