I think many people are surprised when they come to BA. I know many of my friends are. You travel all around South America and you see more Latino looking in many countries. Besides Uruguay which is similar to Argentina in most of my travels it is more of the Latino look.
There are a lot of other South Americans here that you will see but if you stay in Recoleta or Palermo you might not see as much of it. It is a bubble. While I did see several that were clearly from other parts of South America I noticed it more in less affluent areas like San Telmo. I noticed a lot more in San Telmo and I went to a big mall I can't remember which neighborhood it was. It was big and there were a lot in that area too. Especially selling stuff outside on the street.
What area are you mostly in
@MickMolloy?