This suggests that it may take even longer than from grades 3 to 10 for the bilinguals to develop Cognitive  Academic Language Proficiency (CALP).Perhaps it is not until after even more years of immersion in English, such as university studies in an English speaking country the bilinguals develop CALP on par with native speakers, and then start to experience the cognitive advantages of bilingualism.
in relation to the differences between early and late bilinguals the findings of previous research are supported by this study.