ok got it, let's end it here. It was not a joke, it was a (yes, very silly) little game. We take things too seriously in this forum, probably much more than in schubert's time. And by the way, the length of a work has little to do with the fact whether a piece is a masterpiece. I know of some sonate which are far from specials, the same as they are preludes from bach, chopin, debussy which are masterpieces.
It was an attempt to trigger a discussion about the choice of a particular key (from the 12 available), as I was explaining in my introduction.