The polls I've seen for GA elections over the past decade have been pretty accurate for whatever reason. That doesn't mean this poll is close of course, but name recognition alone is a factor in elections. And I agree, voting for the perceived LOTE is often a major factor considered the candidates we often see on the ballot.
My guess is most freshman Senators vote party line anyway. So, even a bad candidate in YOUr party is going to vote mostly how you want him or her to.