Well, yes. But it dates of 1981... Jean-Louis Ferrier was a french art critic and journalist. He published many papers in L'Express then in Le Point and was one of the 'inventors' of the Nouvelle Figuration movement.
La Petite Forme (Denoël, 1985), is a book collecting some of his art papers. The article called 'Le Bouffon et l'Humaniste' ('The Buffoon and the Humanist'), dating of 1981, was a pure attack against Jean Dubuffet, our beloved Nose Flute Hall of Fame Honorary Degree member!
Ferrier dared to write things like « L'irritant avec le bonhomme, c'est qu'il se prend pour Dieu l'australopithèque » (« What's irritating, with the fellow, is that he pretends to be God the australopithecus » or worst: « A quatre-vingts ans, il n'a pas varié d'un iota. Toujours le gribouillage enfantin, la moucheture, la maculation, les fausses couleurs » (« At 80 y.o., he has not varied of a iota. Always childish scribbles, flecks, smudges, fake colors »)
But there is even worst: the attack against Dubuffet's musical choices, and particularly his love for the nose flute!!!
Literally: « Music? His preferences go, for sure, to the accordion, and above all to the nose whistle, that he sniffles with talent... It is crazy, this anticultural obsession of Dubuffet »
Well, besides the controversy, the mocking of Dubuffet and of the 'nose whistle', the writing is interesting... It says that Dubuffet's prefered instrument was the nose flute! And more, this was a known fact, published in french magazines 20 years after the recordings Dubuffet made with Asger Jorn in 1961 (check this post).