In response to El Diablo's question from below:
Why go to the source? If a woman is here already, isn't it better to date her?
I don't think so, and here is why...
Someone who has immigrated to the states, but has chosen to live within the safe four walls of their own sub-culture is different from a woman who chooses to come over here in the name of love.
The former has had an opportunity to assimilate to the American society and has chosen not to. (For a variety of reasons, some of which are very valid... but that's not the point...)
To understand the impact of this, switch things around...
In Texas, the best example I can give of this is to contrast two sports stars. Juan Gonzales and Sergei Zubov.
Juan Gonzales played for the rangers. He speaks spanish, of course, and is a well known superstar in a town where the Spanish sub-culture is vast. To this day, Juan will not give an interview in English, and claims he cannot speak it.
Sergei Zubov came over from Russia. There is a very small Russian subculture. He speaks fluent English.
If both of these men married an American Woman, what would the chances of a happy marriage be -- if the woman couldn't speak anything except English?
The woman would have to assimilate to the Spanish subculture if she wanted to stay with Juan Gonzales, because he had made it clear that he has no desire of branching out of his comfort zone.
Sergei Zubov's wife wouldn't have to, of course, since Zubov has made every effort to become more "American."
So... switch back now. Let's make general assumptions...
You are marrying a woman who speaks spanish (or portuguese) and is moving to America. You have a job in (probably) an american company. Your current friends speak english. Your neighbors do. You are probably not considering raising a family as part of a subculture.
So... what kind of a woman do you want?
I contend that if you find a woman who is here, and is still part of her native culture -- which here is a sub-culture, then she will not want to branch out into mainstream, and -- regardless of the other values she may have -- you will have a very hard time of it.
Anyway... that's what I've decided. Because, clearly in Texas, if all I wanted to do was date a Latina beauty, I wouldn't have to go very far...