Based on my experience in the Boston subrubs, when you move to an area with a reputation for great public schools, you may be disappointed, but the many disappointed parents seeking more create a large market for afterschool programs, some of which, such as contest math programs, are suitable for gifted children. I have asked a few of the afterschool organizers about how to advocate for acceleration in the public schools, and they typically say that public school math classes should be regarded as social experiences. This outlook is consistent with the Serenity Prayer and not coincidentally preserves the market for afterschools.
...and is excellent for the most skilled public school teachers, who can then supplement their teacher pay with tutoring/afterschooling income. Not unlike the Taiwanese system, where the entire system tacitly is designed around nonproductive warehousing during the school day (class sizes of 70+ not uncommon), followed by intensive, income-differentiated afterschooling, with instruction by largely the same teachers you had during the day.
