I award you an A for effort sir. However the devil is in the details and the marketing info. That graph is erroneously drawn to make Class D look better than it is. The x axis is drawn lineraly in power. It should be drawn as a LOG. This would make the difference between the two look much less though, and would exploit the crap out of the fact that Class D has LESS efficency at very low levels.
The graph in that .gif should have the x axis drawn as:
0.0001%, 0.001%, 0.01%, 0.1%, 1%, 10%, 100% ... NOT 0%, 10%, 20%, 30%, 40% and so on.
Class Dismissed