Lara-
I am a huge fan of the Misdiagnosis book. There are many "normal" gifted kids out there getting labels stuck on them by unqualified school personnel, who need some frame of reference to try to understand our kids. On the other hand, my son who has Asperger's had all the underlying symptoms identified in kindy, (motor skill delays, social problems, etc.) but his high IQ allowed him to compensate enough so that teachers said he "couldn't" have AS. He was finally evaluated by a qualified neuropsychologist at age 13, after I begged my family practitioner for a referral because I knew something wasn't right. It is extremely helpful to get a label when one is warranted, as it allows the adults in the child's life to better understand the child and arrange appropriate accommodation and instruction.
