So they gathered 10 reds and 10 whites, and eleven judges (eight of them French, one American, one British.) and did a blind tasting, with each wine graded out of 20 points, on the judge's own, personal criteria. No guidelines or framework given.
At the end, the contest holders only counted the French judges because, obviously, their taste would be superior in this regard. They took the average sum of each score to declare the winners. The results were, ah.
When the results were announced, French judge Odette Kahn demanded her ballot back. She later complained about the Paris tasting because, obviously, a California wine couldn't've won.
Eight years later, on the tenth anniversary of the original Paris wine tasting, the French Culinary Institute held another round of tastings. They didn't think the whites would still be good, so they didn't taste those.
Thirty years after the Judgement of Paris, the British judge from the first contest, perhaps to bully the French, gathered up a bunch of critics, several of whom were in the original contest, and held simultaneous tastings in Napa, California and London, Britain. The French experts predicted the downfall of the American vineyards.
French news buried it and pretended it didn't happen, except, months later, two publications said that the first tasting was a joke and shouldn't be considered a rating of quality.
There was a wine tasting in New York about six months prior where American chardonnays were called superior. French wine fans decried this, said that Americans would, of course, be biased towards American wines, and that the Burgundies had been 'mistreated' in the trip over to America. So moving things to Paris, with French tasters, should've negated that.
Ranking lower were Meursault Charmes Roulot 1973, Beaune Clos des Mouches Joseph Drouhin 1973, and Batard-Montrachet Ramonet-Prudhon 1973.