I live in East Windsor and we are very heavily Hispanic and our scores have gone down!! The Indians have bought the expensive homes, but they are way outnumbered by the Ecuadorians and Dominicans and Guatemalans, etc. Hightstown is turning very Hispanic.
Some ethnic groups do very well academically on average; some ethnic groups do dismally on average. Without pinning the rose, America is getting heavy immigration from ethnic groups that do not do well.