I was recently introduced to one other mom whose daughter skipped 1st grade at this school. She said the K teacher (a different one) was pushing for the skip and the principal was skeptical but finally agreed. So it has been done.
That's really good news! I love the idea of asking the teacher to handpick the 2nd grade teacher. You might also consider asking the teacher to grab some 2nd grade level material from one of her teacher friends and start to develop a little 'portfolio' of 'what he can do' so that when you meet with the Principle, you have BOTH the testing AND actual work samples based on your particular school's expectations.
If the teacher isn't willing to do this, perhaps she could help you gather the materials and you could administer them at home, or you may be able to gther the materials yourself through the Mommy-Network. Someone has to have an older child who is currently in 2nd grade.
Or wander the school hallways and check out the work that is posted in the hallway bulletin boards. Our schools always have samples of the student's work in the hallways.
Best Wishes,
Grinity