Here are two graphics I made to compare the 2008 route and the 2009 route for the Athens to Atlanta (A2A) Roadskate, for anyone who is curious. I imagine a very few people will be intensely curious.
The first graphic shows the changes in elevation profile and distance for 2008 and the 2009 detour. It takes a little over 5 seconds to switch from 2008 to 2009 and then it should repeat to infinity and beyond.
Detour Start for 2009
33° 56' 58.5564" N, 84° 4' 58.584" W