The difference between the big 12 and other conference like the ACC is we don't have many bad team. Tech and tcu are bad. In the ACC there's clemson, FSU, wake forest, VT, GT and Boston College.
You could even make the argument that TCU isn't that bad of a team. They look competitive and received votes this week. I would make the case that what separates the B12 from the ACC, SEC, B1G, etc is that the B12 is competitive top to bottom (with 70% ranked)
and plays a round robin schedule where every team sees each other both home and away. That, in my opinion, is what separates the B12 from the other conferences. Some of those other conferences teams
might see another team twice. B12 teams
will see each other team twice
. Not many conferences can say they play a round robin schedule that is respected enough to send 7 to the tourney. B12 did last year.