I don't think so, it does not fit the stereotype. Anyway, I think it is meant to convey that we Yankees are snobbish and nosy, and we are >:P
I think the implication is not so much that Yankees are nosy, in the sense of inquiring into personal matters, but that they often come to the South and try to tell local people in general how to "improve" things--that is, they want things done the way they are done back in the North. Wider roads, more development, modernization, uniformity, more laws, more government control of things, more liberal policies, etc.
That for the most part doesn't apply to Yankees on this forum because conservative Yankees are generally in favor of most of the attributes of Southern life, like decentralization of government, lack of gun control, close family life, respect for the military and for religion, and perhaps a more leisured way of living.