Not necesarily.Many homes in the colder climes are built with "cold" attics meaning that the attic itself is not insulated per se except the floor,which is the ceiling of the floor below.Our home is like this.The eaves circulate air into the attic and keep it cold in winter but the air flow is key to keeping ice jams from forming,gases from building up ect.I liken this to a house within a house.So in my developement all the houses have snow on the roofs.
I think he knows this and was pointing out that one house on the right, which had less snow on it's roof, could be the result of poor insulation on the ceiling deck.