This one only shows you poor “expertise” more than anything, as it is standard exercise while training to become a wine expert in France (they also give students white wine that have been red-colored or otherwise tempered with), so I wouldn't expect any legit expert to be fooled this way. Though it's true that with some wines it can be tough initially for enlightened amateurs.

Source: my wife's godfather did the studies for that[1] two years ago.

[1]: https://www.isvv.u-bordeaux.fr/fr/diplome-universitaire-dapt...