as for any "positive effect" Mikey? ...from the link:
"The rational of the Court's decision was based on the dehumanizing effects of segregation:

"Segregation of white and colored children in public schools has a detrimental effect upon the colored
children. The impact is greater when it has the sanction of the law, for the policy of separating the races is usually
interpreted as denoting the inferiority of the negro group. A sense of inferiority affects the motivation of a
child to learn. Segregation with the sanction of law, therefore, has a tendency to [retard] the educational and mental
development of negro children and to deprive them of some of the benefits they would receive in a racial[ly] integrated school system."

Somehow I don't think the same principle applies to all-girl schools, which I was one of :]