Hi lovemybaby!
The others have given you some great advice, and I'd like to chime in with my experiences on the Developmental Pediatrician. My son had to go every six months to a DP since he was born premature and therefore at risk for developmental delays.
I found that the DP's that DS saw were not_at_all experienced with gifted tendencies or asynchronous development. It seemed like they were experts on the needs of kids at the complete opposite end of the spectrum, and just weren't prepared to help with our needs. As a matter of fact, once they learned that DS was gifted, they seemed to think that all of his developmental issues had just melted away.
Even though DS still needed help with sensory integration, we stopped going. The final straw was the last appointment where I was warned that DS might have a non-verbal learning disability and Asperger's. This decision was made because his Verbal scores were extremely high on the WPPSI, while his Non-Verbal scores were unusually and significantly lower (yet in the moderately gifted range). This difference, the doctor reasoned, must be due to some problem. Since DS doesn't have symptoms that point to NVLD or Asperger's, I came to my own conclusion that the doctor was full of bull.
I found that a good Occupational Therapist was much more effective in helping us fine-tune DS's learning environment and in dealing with his SI issues.
So if you decide to go the Developmental Ped route, make sure to find one who is not only familiar with gifted issues, but also works with gifted children on a regular basis. Otherwise, they might be looking for explanations of problems when there really isn't a problem at all.
Good luck!
Christi