Michael,
Just to affirm what Gail said - our ENT told us a story of a patient who he would have said still had the cancer at the first apt after treatments but it was gone within several weeks as the treatments continued to work with no recurrence noted later. He too did not want to be aggressively assessing response too soon. Of course, he wanted to hear any of our concerns so as not to miss anything that triggered a red flag to him. Also, a radiologist friend of ours told us long ago when we asked what actually happens to the lymph node post radiation that it doesn't actually disappear but becomes smaller and hard like a kernel. Just some thoughts about what may be going on but of course seek professional advice!
Janet