You might need a little more than nit-picking a few studies. (Especially as you don't seem to cite any conflicting data.)

Another source, by the way, is Andy Pruitt, one of the top cycling sports docs, who heads up the Boulder Center for Sports Medicine, does fittings for numerous pro teams:

"Because of advancing technology and the development of new ways to observe and measure biomechanics in action, we know a great deal about the pedal stroke. And one of the things we know is that even the best pedaling stylists don’t produce power when they pull up on the backstroke. The most they can hope for is to unweight the rear foot so it adds less drag to the power output of the foot that is pushing downward. But it’s not possible even to get the back foot out of the way entirely."
http://velonews.competitor.com/2010/...yclists_137556

With all due respect, I'm gonna go with the top sports doc, who has been working regularly with top pros in numerous disciplines (including road, mountain & track) and has been using pedal-based power meters for over a decade.