I think the word "potentially" is carrying a lot of weight there. Do you have any sources that these things happen and/or that they negatively impact students

I think the word "potentially" is carrying a lot of weight there. Do you have any sources that these things happen and/or that they negatively impact students outside of those programs? The argument I've heard previously is that G&T programs remove peer role models from classrooms, which lowers the class's average behavior and achievement. I was a G&T student for 5 years (2nd through 6th) and have close relationships with people who were educators then administrators in a G&T program.