Deep breath! Amazed, wow.
I agree with Grinity that this Psych. is going to be a great advocate, but I also think he is a bit old school (you said he had been doing this for 40 years) when it comes to grade acceleration. His fears on the social side seem to be based on the myth of radical acceleration being bad for kids (although he concedes a couple years are okay, at least in this extreme case). You might want to look at this page for the Acceleration Institute:
http://accelerationinstitute.org/ and maybe buy a copy of Nation Deceived for the Psych as a thank you present

As for not answering questions, bah! I suspect his concern is that you will hothouse her and push academic subjects on her. But as long as it is child-driven, you need to go where she leads you. I think Wren's suggestions for extracurriculars are good as well (or some other area she is interested in of course).
Finally, it can be hard to remember she is just a baby really in many ways. Big brain, but still only on the planet a short time. Thus, I think with the school options you will need to watch the emotional and developmental responses (not to the academics, but to the environment). Sometimes I catch myself with my DS9 so focused on nuturing the intellectual, that I wonder if I am focused enough on nurturing the emotional. His general happiness and well-being suggest I am thankfully, and in the end, isn't that what is most important for our children (needless to say the right academic fit goes along way toward emotional happiness with our kids).