Is the gifted school public or private? It is my understanding that public schools help remediate learning disabilities, often with IEPs and 504s, and that private schools are not necessarily required to do so. Gifted schools (and gifted programs) can differ considerably in other ways as well. For example, some may support individualized curriculum and pacing, some may be lock-step one year ahead, some may be accelerated by several years.

If I recall, a score 2 standard deviations (30 points) lower than other scores is considered significant.