I was acquainted with a couple of believers from the UP Nepal border - not yet adults, who appreciated the wisdom of their mullahs that they should quote by rote the Koran before undertaking formal education. This happens by the time they are 12 to 18, during which they are married and the same madrasa's advise them to undertake filial responsibilities rather than idle about with strange language books. This too they admitted was sensisble as they stated "it makes sense that they provide for thier wives and child/ren first then try to be a doctor / engineer".