None of the percentages make sense. In WI, a candidate who is winning 90% of the vote would most likely sweep every county.
These are mainly guesses as this certainly didn't happen in 2008 and thus it's hard to see which county would go where and by large a margin and how much that would add to the percentage the county's winner has. Each state is very spread out and thus it's hard to really pin down who's winning where.
But your guesses are severely overestimating how much counties vary. As an approximation, if you have two candidates, take their vote shares and raise them to the 4th power to find counties won. If Breseden wins 65% of the NC, and Obama 35%, he would win 92/100 counties. At 75%, 99/100 counties. Any candidate who takes 80%+ is almost guaranteed to sweep the state.
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