Rural voters key to NC-11?

Much has been made this week of a new poll showing support for Republicans slipping among rural voters. See here, here and here, with a release here, analysis here, and the full poll here.

Over at The Political Junkies they point out a nugget of analysis that is North Carolina specific. Quoting TPJ quoting Greenberg, Quinlan, Rosner Research:

"At present, the Democrats enjoy a 46 – 44 percent margin in named trial heats. Most notably, looking only a districts that switched parties in 2006, the Democratic margin grows to 56 – 34 percent (e.g., Kansas 2, Iowa 2 and North Carolina 11). While the sample size here is fairly small, it appears it will be a severe challenge for Republicans to reclaim these seats."