It appears that Romney won District 10 (the thumb) and that the final score was 15-15.
http://www.freep.com/article/20120301/NEWS15/120229059/-1/7daysarchives/Graphic-How-Michigan-voted
MI-10 did not end up being all that close. The CD that right now is listed as having been won by Romney but might flip to Santorum is MI-05, in which Romney clings to a 488-vote lead with some votes apparently still to be tabulated.
http://www.freep.com/article/20120301/NEWS15/120229059/-1/7daysarchives/Graphic-How-Michigan-voted
If Santorum ends up winning MI-05, only then will he have a 17-13 delegate advantage in MI over Romney.