I found this article extremely accurate. I was part of the gifted program in my district and we constantly had to educate folks on what gifted education is and push back against the district when they tried to shut down the program. Mostly on a basis that it 'wasn't fair' to other students that the gifted students (GIEP) had special accommodations. Though no one ever argued against the IEP students and their accommodations.
it's hilarious to me as a foreigner to read this topic. my (gifted) school taught (American) university Math in 8th grade and it was fine. it's a public school with little funding and no endowment - the teachers just teach different stuff and noone really bullies you if you falls behind (most likely because they have their weak stuff too)