As far as I can tell, neither study is publicly available. And I'm not giving out a Pubmed password.

Despite your attempt to nit-pick the studies, the results are actually pretty clear: Intentionally pulling up reduces your total (gross) efficiency. An increase in mechanical efficiency that results in a reduction of gross efficiency is counter-productive.

I have also not seen so much as a single scrap of evidence to demonstrate that cyclists do, in fact, add power to the drivetrain on the upstroke. No studies, no data, no charts, nothing.

And again: Pruitt has been working with pedal-based power meters and pro riders for years. If the guy says that "no one adds power to the drivetrain on the upstroke," I'm going with him.