Oh well. Let's compare some data...
statewide...
McCain 2.049 mio votes, Obama 1.844 mio votes, other 35k votes
Chambliss 1.867 mio votes, Martin 1.757 mio votes, other 128k votes
runoff (note: 97% reporting) Chambliss 1.221 mio votes, Martin 906k votes - less than half Obama's total. "You'd think his name begins in an O" is doing him some quite undeserved honors.
Some random counties...
Fulton, DeKalb, Clayton summed...
Obama 609k, McCain 212k, other 7k
Martin 559k, Chambliss 213k, other 23k. Yeah, Chambliss did marginally better than McCain here - more evidence of McCain's lack in metropolitan appeal
runoff (2 precincts out) Martin 314k, Chambliss 146k. Turnout held up better than statewide. For both candidates actually (Martin at 56% against 52% of his raw vote, Chambliss 68% vs 65%). I think this is probably important.
Fannin County (random rural Republican place in the north. Sam said to look north.)
McCain 7.8k, Obama 2.6k
Chambliss 6.5k, Martin 3.1k, other 500. Ah yes, Martin outpacing Obama.
runoff: Chambliss 4.2k, Martin 1.5k
Martin won a grand total of eight more counties than Obama in the first round. He must have won fewer in the second, but I was too lazy to count'em out.
If things were all about turnout by race, anyhow, one would imagine an above-average swing in places with sizable numbers of Blacks and Whites. So I went me with Obama's narrowest county wins. Problem was none of them was wholly in yet. Baker (in the deep south) isn't completely in yet, which in a small county (6 of 7 precincts reporting) can foul up results something bad. Martin is still barely ahead right now, though. Wonder if that'll change. Chattahoochee with 2 out of 3 precincts reporting (much of it is covered by an army base. But the populated parts of the army base are over in Muscogee County.) is just worthless.
Newton County is one of those outer metropolitan Black-trending counties...
Obama 20.8k, McCain 20.3k
Martin 20.2k, Chambliss 18.2k, other 1.2k. McCain metro weakness not in evidence this far out.
runoff: Chambliss 12.2k, Martin 10.3k. Hmmm... in line with state.
For a more definitely rural close county... argh.
All the closeish Obama counties seem to have an unreported precinct. Eventually settled on Wilkinson. Which didn't vote for Obama.
McCain 2349, Obama 2298, other 23
Martin 2403, Chambliss 1980, other 73 - yeah, here we are on "Martin outperforming Obama" turf.
runoff: Martin 1310, Chambliss 1298.
So, conclusion: I'm not all that much wiser than I used to be.