Herman Cain has been ahead of Mitt Romney in the most recent GOP presidential candidate polling average at Real Clear Politics by a microscopic margin since late last week.
Readers might be surprised to know that the wordings of the presidential preference questions at the various polling organizations differ significantly. In my view, the same person might given a different answer depending on which organization's polling question was asked. Here are the examples, with the Cain-Romney split identified in each instance (links are to fairly large PDFs in some instances):