Culture and race are separate things, and GSM mentioned cultural norms.
'White girls' come from a variety of cultures too (is it racist of you not to acknowledge that, Glorianny?) As we have discussed, some of those cultural backgrounds will hold them back in various ways, and others will encourage their career success, which is also true of cultures in all racial groups.
You seem to be bringing race into this again, (*Glorianny*) as you did when you accused me of racism on another thread, despite it being you who made the racial connection in that case, when I was talking about sex.
There are Asian cultures which encourage girls to marry young, and if this girl was a British Asian from an area where early marriage/cohabitation was the norm anyway, then maybe she would do exactly that regardless of race. I am unsure about lifting someone out of their cultural milieu like that to be honest - a schoolgirl in particular might struggle to reconcile norms and differences, particularly if she is on her own rather than with her friends, and there is something of the 'rich house/poor house' about it, on the surface at least.
I don't think that anyone would suggest that Asians don't have a strong work ethic, and there are all sorts of possible reasons why the experiment didn't work. All we can do here is speculate, so the example doesn't really give much of an insight into the reasons underpinning inequality.