Funny, some of my best friends are South Asians and I've taught many in schools. They put great value on education, are hard working and generally very pleasant to be with. Often more open and friendly than many of their Chinese counterparts perhaps due to the fact that they are also a minority group. It is virtually a guarantee that in schools like West Island, KGV or Delia where there are large South Asian population that there will be at least one scholar and one athlete that will be in the top ten of the school.
Just like any population, you can look at the worst of them and make generalizations from it however it doesn't mean that it applies to everyone. Far from it in fact...