ARC's 2017 population estimates
were released today. The city of Atlanta "added 9,900 new residents between 2016 and 2017, the largest single-year estimated population increase since the Great Recession." 13% of residential growth in 2016/2017 happened in the city, and 87% outside the city limits (mainly in Fulton, Gwinnett, and Cobb). So there's still a lot of suburban growth, but every county experienced slower growth from 2010-2017 than the 1990-2010 average, while the City of Atlanta is growing
17 times faster than its 1990-2010 average, and in just this past year the growth rate was
41 times faster than the 1990-2010 yearly average. Huge shift.
Edit: quick chart I made of city of Atlanta population in the last 37 years. Decade data from the census, 2015-2017 data from ARC.