Another update: I got a response from my email. I asked to meet with her to discuss ds and her professional opinion on my son's academic proficiency.

She wrote back the times she was available. And this:
"A (ds) appears to be doing fine. He really likes to show me what he already knows and I try to keep him going even though right now the curriculum in a lot of review from Kindergarten. The first two weeks are the easiest, then our curriculum in reading and math get more in depth and harder it seems.
Please feel free to come in and observe our classroom at any time."

I am not sure how to take what she wrote. Or if I am just being overly sensitive cause I haven't even had a conversation yet. Do you think she will be open to some acommodations?

I would take her up on her offer to observe the class. That will give you an opportunity to actually talk to her. Meanwhile, investigate ways to have your DS' abilities verified independently of the school.