From ESPN's B1G Blog, today:
Nate from Columbus writes: If two or more teams finish tied for the division lead, does the Big Ten consider them to be division co-champions (similar to the pre-divisional days when you could have conference co-champions with only one going to the Rose Bowl), or is there just one champion per division? Specifically, if Ohio State and Penn State were to finish with 1 conference loss, would they be co-champions of the division or would a tiebreaker be used (presumably head-to-head result)?
Brian Bennett: I double-checked with the Big Ten office, which confirmed that if two or more teams end up tied with the same conference record, they will be considered co-champions. So if Ohio State and Penn State each finished 7-1, they would be considered Leaders Division co-champions. The tiebreaker is used to determine who goes to the Big Ten championship game, but since neither of those teams are eligible, no tiebreaker would need to be used (though Ohio State fans would certainly claim they won the division, not shared it). Wisconsin and Penn State were co-champions in the Leaders last year at 6-2, but Penn State later vacated its wins and the division title as part of its NCAA sanctions.