You have conducted such an experiment and got more real life approaches and interest in south america?Here's a social experiment for guys out there. Go to the park/to church/ to the club here in America and see how many women you attract.
Then go to the same type of location in South America and see how many women are interested in you.
If you don't feel like going thru such an extensive experiment [hey, I don't blame you!], then get on Tinder and browse around in both locations. See how many matches and messages you get in one location vs. the other.
You'll quickly realize that something is severely off about gender dynamics in North America, and one sex is more in the wrong than the other...