No for us. But then there's no state mandate for g/t where we live and no incentive to offer any differentiation either in the early grades despite the later emphasize in New England with higher education.
Even the private gifted schools around here cannot accommodate a child like 1111's. That's been our experience and why we're un/homeschooling our ds8 (who technically would be in second grade with the public schools). The private gifted schools are aimed at the mg/hg or so - those who may be working a grade, two, or three above levels. They're not aimed at the pg crowd or other outliers.
A lot of it depends on the teacher/s, school, curriculum, other students, etc. There are a lot of variables beyond a child or parent's control with any formal schooling. Some kids are ok or tolerate this lack of control over their education. Others need large chunks of solitude and being alone to function and are not ok without someone else determining their education.