Georgetown Day is superb academically, the classroom atmosphere impressed me as dynamic and vibrant, and I have heard that they do a good job of accommodating children's individual interests and abilities, but we did not choose GDS for DC in 7th grade. Mostly GDS was just too liberal for us.
First, the practice of children's addressing adults by first names did not suit us.
Second, we were told at an upper-school presentation (which GDS encourages you to attend if you are applying to middle school), that ANY club that a student proposes is permitted. Really? Any? That is just too permissive and undicriminating in our view.
Third, my DC was turned off during his visit by the students' eating popcorn and drinking cocoa during class. He thought that was strange. He also did not like the idea of teachers' wearing pajamas to school on pajama days. So the school was not a good fit for him, clearly.
And, finally, I got an interesting glimpse of the permissive culture when I was waiting in the lobby to pick up DC after his visit. A bunch of middle schoolers sat in the chairs next to me and put their feet up on the coffee table in front of me. A teacher walked by and admonished, "Feet off the table, please. We have a visitor!" Really? Sounded as if feet on the table are okay when visitors aren't around.
Recently, another prospective parent told me the same story of feet on the coffee table, and I was astonished.