Yeah, I'd say it's closer to 6 or so (depending on if you hit rush hour in ATL or not). My mom lives in the N GA mountains about an hour north of Atlanta, and we can get to Orlando from her house in 7 hours.
To do it in 5 or 6 hours you would have to be speeding. I wouldn't advise that unless you want risk getting a ticket! We see a number of police cars along the highway trying to catch speeders.
I know it's wrong, but when I'm heading to WDW, I am like Mr. Sulu on the Starship Enterprise. Maximum warp.No WAY it's an 8 hour drive! I can make it to Orlando in 8.5 (maybe 9) hours from the Middle of North Carolina! My cousins live 20 minutes south of Atlanta and I think they can do it in 5.5.
To do it in 5 or 6 hours you would have to be speeding. I wouldn't advise that unless you want risk getting a ticket! We see a number of police cars along the highway trying to catch speeders.
Geez, I've never made it from Atlanta to Orlando in less than 7.5-8 hours. I do like to stop every two hours or so, though, to stretch my legs, buy a drink. Plus, there is ALWAYS constuction in South Georgia around Tifton/Valdosta, and that does slow you down a bit.
... I will NEVER do that again! 
With no traffic or road construction, and minimal stops for restroom, gas, etc., the drive can be made in about 5 to 6 hours. I'd plan on 7 hours.

When is there NOT traffic or construction going through Atlanta?
When is there NOT traffic or construction going through Atlanta?
I agree, 5 or 6 hours from Atlanta.![]()

That's exactly why I said plan on 7 hours. Atlanta and traffic are like peanut butter and jelly or spaghetti and meatballs.
I believe you can dial 511 in GA to get interstate traffic reports (haven't tried that lately). If your trip is soon, there is road construction on I75 north of Valdosta, south of Perry. The Connector (where 75 and 85 merge in downtown ATL) is being repaved on weekends.
but we will have our puppy with us (about 5 months old at the time of the trip) so we will probably stop a little more than normal.