Yeah...I was thinking the same thing. Why would it matter if a teacher had a preconceived notion? Is she unable to create her own theory indepently? As a clinician/diagnostition, it never ruffles my feathers for parents to come in with their own 'diagnosis', whether it's accurate or not. After 15 years, I've learned that parent's instincts are incredible. Even if they aren't spot on, I trust the gestalt of their perceptions. This is your son, not a double blind study!