The twinnies were HORRIBLE, HORRIBLE! I liked them in the first few episodes, thought they were gutsy and go-getters but wow, they turned into nasty pieces of work. I can't think that they will be proud to see the shows and how they acted.
And I don't think it's a cultural thing, because they are Sri Lankan or whatever. Respect for other human beings, basic courtesies are universal and their parents should have taught them better.
Even Trey and Lexi were not downright mean, they were just trying to get a head, as any racer would be. They didn't resort to name calling and dirty tricks (except the money thing). I would not be proud to be Trey and Lexi either but would certainly hate to be a Twinnie or one of their parents.
Now, the Chippies's parents can be proud. Sure, their boys take their clothes off for money, but they have good manners, are polite, respectful and most of all kind. And kindness goes a long way. The Long Haired Rockers too.