Yes I generally agree with all your comments. However the economy of the car depends on its weight and aerodynamic design. As a point of note I have had paint devils attend to the Yaris now twice this past year to take out two dents. One in the roof, probably a small branch and one in the bonnet. Never needed them for to countless VW's in the previous 12 years. You will have noticed the contours in the roof line. Clearly there to add strength to a very flimsy roof. Dent Devils commented all the modern new small cars seem to be being built with thinner panels to cut down on weight and cost.