The passage of time is not always kind to our favorite artists as long-awaited releases often disappoint. We program our cd players to play the 3 or 4 "listenable" tracks as we reach into our collection  for our favorites when the artists were in their prime. After nearly two  decades of no Steely Dan, it's great to hear a strong release from a  "group" that hasn't missed a step during their absence. "Two  Against Nature" can stand proudly among Steely Dan's best work.