When I lived in Paris, arguing over wines, California verses France ... was a hot topic and discussed often.
Did you ever get a someone from France to admit that Californian wines are as good or better than French? 
LOL ... almost. I was attending another dinner party, this one in the Parisian countryside. It was held in my honor ... (for no other reason than my friends ran out of other reasons). We were on the last course, cheese and Champagne. Borfiga, the host, was standing up with the first bottle and was starting to remove the wire.
I was sitting directly across from him and I softly said, in almost a whisper, "Six".
Borfiga stops and looks at me, "Qu'avez-vous dit?"
"Six", I said in a normal tone, "That wire has six twists. All Champaign wires have six twists."
At that, Borfiga repeatedly hits his glass with his spoon until all was silent. "L'Américain dit qu'il existe six torsades sur le liège ... Nous allons découvrir." With a Frenchman's flourish Borfiga announces "Un ... Deux ... Trois ... Quatre ... Cinq ... ... ... Six ...", and the wire fell off. Borfiga smiles and looks at me and waving his hand announces "France acquises to California".
That was the closest I got.

(Netflix
Bottle Shock)