I would hardly consider a .60 size plane a "giant scale" plane. It's more middle of the road giving you most of the advantages of both large and small planes. As far as not being "grounded" in windy weather, well, I have flown 1/2A RC planes in winds that grounded most of the people at the field.

When model airplanes approach the size of full scale airplanes, they start to fly like full scale airplanes, when they approach the size of birds, they fly a lot like birds, scale them down to the size of insects and they start to fly a lot like insects. Flys can't fly the way a Boeing 747 flys, on the other hand, a 747 can't do an inverted landing on the ceiling. What size flys "better" depends a lot on what your definition of "better" is.