I remember reading about this study. They conducted the study at the oenology school that was right next to my engineering school. I vaguely remember that they used the student from the same oenology school for one of the study. I read similar studies conducted with wine experts, the conclusions were similar, it's about expectation. Maybe few people with extraordinary taste buds could tell the difference, but the general population won't.

You can find a link to the study there https://www.theguardian.com/lifeandstyle/2013/jun/23/wine-ta...