So based only on November turnout (which she's winning in this poll), she leads in the runoff? Shocking! Nevermind the fact that that's a completely irresponsible move by the pollster.
Jim Martin? Jim Martin! 2008. Martin, Jim.
And basically every runoff ever. Wake up from fantasy land if you think an early January runoff will have anywhere near the same kind of turnout as November's General.
There's also 1992 - which took the same trajectory - but the slide was much smaller. In fact, both candidates technically increased their share of the vote (though Fowler only did so by 0.1 point).
This type of run-off scenario hasn't been assessed yet, and considering the combined efforts of the Nunn/Carter campaign are more advanced and organized than any other campaign
ever in Georgia, the dynamic may actually have potential to work in anyone's favor. Conventional wisdom suggests that a post-holiday turnout could be so low that it's possible to short-circuit the standard if ATL is organized enough. Likely? Probably not, but still worth considering. There's a point at which turnout decreases to a point that both sides could be at a disadvantage, and a strong ground-game will be all that matters.
But yeah, Nunn's getting to the point in these polls where
factors like this combined with the unprecedented voter registration numbers might actually make the difference, and one that we're not yet seeing.