"La Plus que Lente" by Debussy - a Social Comment??

The other day I was discussing Debussy and his "La Plus que Lente", a piano piece he had written, I believe, in 1910, and certain speculation about the genesis of this composition abounded; primarily, centering around the possibility that the title implied the "decadence" of the waltz form, especially if it was a slow waltz. As Debussy could be rather derisive at times, this kind of speculation really did swirl around Parisian circles after the composition appeared.
Another story also took form. I cannot tell you as to whether it is apocryphal , but it did make its rounds during this period, and goes as follows:
A pop tune, named "Valse Lente" (slow waltz) achieved a measure of success, which bothered Debussy, as he felt his poverty was undeserved; and so, in a derisive spate of activity, he wrote "La Plus que Lente" (slower than slow), demonstrating his irritation toward mediocrity in taste.
True or not, it WAS a tale bandied about , and I thought that you might like to know of its existence after the composition first emerged, and, ironically, became one of Debussy's more popular piano pieces.