Originally Posted by pallen

No one is saying clipless pedals magically give you continuous power, that's just silly. These graphs are exactly what I would expect for steady state cruising along with or without clipless pedals. I do notice a bit of negative values, especially on the right foot. Its small, but I wouldn't call that insignificant. The fact that you can unweight your pedal completely without your foot floating off is also very significant for power production.

I completely agree with their conclusion - that pedaling technique is not that significant to power output. Notice their conclusions mention nothing comparing to platforms, sprinting or climbing a steep hill. Is there a graph showing power output on platforms? I find when I am on platforms that I never fully unload the upstroke pedal, and my feet start hurting a lot quicker.