I am not sure what surge IA is seeing. Their poll posted on 1/26 (with data through 1/25), showed it Romney +8, about the same as what the OP showed. Big difference between the IA poll and Survey USA which both did surveys today.
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I too have concerns with the IA targeting, because so very few (over 600) were polled, in a state the size and population of Florida with its diverse demographics and regions.
I read on another thread that you need at least 1500 to get an accurate poll in Florida. Also that Romney usually underperforms his polls(maybe a certain lack of excitement or enthusiasm?).