I don't think Latino is mixed as in black/white mixed marriages. Latino is a distinct and proud race. I think it's the result of Spanish and Portuguese (same racial background) interaction with South American Indians. But the spanish and portuguese blood there is small since most spaniards stayed home anyway.
I've heard many Mexicans try to distance themselves from the blends by assering that they of are Spanish stock.
I don't think Latino is mixed as in black/white mixed marriages. Latino is a distinct and proud race. I think it's the result of Spanish and Portuguese (same racial background) interaction with South American Indians.