Hi Barry-
We are not ranking as well for Nashville, but we follow the same formula for links/layout in both markets. We don't have any inbound links to property pages (example: http://clickscape.com/9753-Palmeston-Place-0-Johns-Creek-GA), but we rank on the first page of SERPs in Atlanta for these similar long-tailed terms due to site architecture/navigation. The formula is not working in Nashville and I was just curious if there was a reason why that might be.
Also, you are correct. The search volume in Nashville is about 70% of the volume in Atlanta so that definitely plays a role.