I don't know your child, but in general, American educators have a bias against acceleration (docmented in "A Nation Deceived"), so when a teacher goes out on a limb and recommends it, I would take the suggestion seriously. What does your daughter want to do? You could discuss with her what the activities would be in KG and 1st grade and ask what she prefers.

"To see what is in front of one's nose needs a constant struggle." - George Orwell