Some good points, Gil. When you say the dragon is at the left 1/3 mark, I agree though it's deceiving because technically speaking, it nearly spans the width of the peice. But, it's the head/neck/chest that I think one focuses on naturally - that area is aligned well with the left 1/3 vertical mark. But then you confuse the golden section with the rule of thirds. Made a quick animation for the sake of the convo here . . .
Golden Section VS Rule of Thirds:

The large colored dots where the lines intersect are said to be where the typical viewer's eyes are drawn and are therefore the best areas to put the focus subject matter. Lines are where major transitions/edges should fall. bla blah blah, you know the rest.