Yea, I have ten B1G teams in my bracket right now, but I don't think it will be that way come March. B1G will get 8, maybe 9. Just not enough wins to go around. Things would have to break just right to get 10. NW, Illinois, Penn St, and Rutgers would have to lose to every team above them in the standings. And Michigan/Michigan St would have to drop a few games each to the B1G teams that will end up near the bubble. Even then, the rest of the teams would have to sort out the remaining wins just right. Likelihood is at least one of Indiana/Minnesota/Nebraska/Ohio St is not going to make it.
Big 12 is extremely balanced. The last place team just beat the first place team. B1G is probably a little better on the high end now that Kansas lost Azubuike for the season.