Hollander's reference to Bartók is rather superficial. Most Hungarian listeners can identify the "serenade theme" in Movement Four as the chorus of a popular irredentist song, nostalgic enough as it was written after Hungary's dismemberment in the Treaty of Trianon (1920), when Transylvania was attached to Romania (see the reference to the "Transylvanian Consulate" on the next page). So even if not "dry", it definitely sounds "disconsolate", an expression of desperate homesickness. Musicologists cannot quite pin down why Bartók chose to paraphrase such a trivial song; the most recent theory is that by giving it a Romanian rhythmic twist, he expressed his nostalgia for the multicultural Greater Hungary thad had been lost forever. (Sorry but I can only give a Hungarian link; the musical sheet is at the bottom.) I think the main theme here is intrusion rather than exile as the serenade tune is disrupted by the Shostakovichian "drunken gang".