That was my recollection as well, that the polls had it neck and neck, and then Walker won big. I would expect that if the polls are saying something similar for Romney, it means he will really do very well.
My feeling as well - hard to believe that a state that turned out LARGE for Walker has suddenly softened on the libs. I drove through Wisconsin shortly before the recall election and can tell you that never have I seen an electorate that was so involved. It seemed like one out of every two cars, lawns, etc., had signs and bumper stickers! I simply cannot believe that those same voters have either lost interest or decided that the extremely pro-union Obama is their candidate of choice. I believe the polls are as wrong this time around as they were at the time of the recall election. On the other hand, the libs are more prepared this time for the avalanche of Conservative voter turn-out and will up the ante in terms of fraud (expect a lot of busses to arrive from Chicago and to make two or three stops to vote) - there is too much at stake for them to come in unprepared this time around.