According to the website, "approximately one third" are advanced to the next round. The congrats letter said there were more than 5200 applications, so if the 1/3 ratio holds, there are still more than 1700 of us! Damn.
Just heard back too and passed the first round for Beginning Korean! Holy cow, I was not concerned one way or the other about this--thrilled to get it, fine without it--but now the levels of advancement have my stomach in knots.