You are totally clueless about Atlanta, and though other immigrants are moving here, the overwhelming majority are Mexican illegals. Hence, they really aren't immigrants.
Yes, I do think that the Olympics have played a role, in that they shined the spotlight on us for us to receive a larger share of the invaders. However, that's what they are. In Smyrna, there are sections with shopping centers completely in Spanish, Bus Stops in Spanish, billboards in Spanish. In Marietta, the illegals pile up on the sides of roads, creating a traffic hazzard. In Chamblee, these "immigrants" even have road signs in their language, as well as having the majority of signs in their language. Most, if you try to talk with them, can't understand a word you're saying. They're too busy plastering the Spanish language everywhere they go, as well as painting their shops red, white, and green.
Furthermore, as for Atlanta being the NY of the South, I find that to be an insult, as much of NY is a dump. However, if you're referring to our large skyline and large business contingent, then you are correct. All this talk of "NEW SOUTH" is a bunch of nonsense. What is considered the "NEW SOUTH". Welcoming illegal aliens with open arms?
Here's what I know about Atlanta: it's been going through a well documented boom of both ecomony and population, this after years of promoting the city heavily culminating in hosting a very well done olympics. Given that it's safe to assume a lot of the new residents will be immigrants.
I'm not surprised at the clustering. Actually I'd be surprised if they didn't. According to this site:
http://www.atlreg.com/resourcecenter/censusdata.html# you've got a lot more black neighborhoods than hispanic, and asian is running a little under hispanic. You're experience doesn't sound any different than mine down in South Tucson, or in the area of Pat's Chili Dogs or the other largely hispanic neighborhoods in Tucson, I learned to say "dos cervesas por favor" a long time ago and that's about all the communicating I really need. Welcome the ethnic neighborhoods, they've been around since the early days of this country. Go to San Fransisco and see how many non-tourists are fluent English speakers in Chinatown or Little Italy.