But the larger issue -- that they have direct financial incentive to unconsciously bias the results -- still exists. This isn't anything against Arango's team, I'm sure they're lovely people, but even physics experimental results have been shown to be biased when the experimenter knew the testing hypothesis.
"I think I've been in the top 5% of my age cohort all my life in understanding the power of incentives, and all my life I've underestimated it. Never a year passes that I don't get some surprise that pushes my limit a little farther." -- Charlie Munger