Don't use your turn signal!! I know that sounds crazy but people there will actually speed up to cut you off and prevent you from getting over if they see your turn signal on. Just do like I do, only use your turn signal when you are already getting over. That's just to let them know that you are about to cut them off rather than the other way around!
What part of ATL are you looking to move to? A lot of people live North of Atlanta, so there is a lot there BUT the traffic is horrendous!! I lived on the north side, TowneLake/Woodstock area in Cherokee County for about 8 years and then moved south to Newnan in Coweta County and much prefer the latter! Anyway, if you have any other questions, just pm me and I'll be more than happy to help.