Of the 11 cousins on my father's side of the family, (grandchildren of immigrants from the UK ... not toffs) all of us have University educations, two with PhDs, (both were University professors...now retired), two "Masters". All of us have at least 16 years of formal education and most of us more than that.
Had my grandparents stayed in the UK, probably none of them would have had the chance to even attend post-secondary schools.