The Big 12 was not only the best conference once again in CBB, but it was also the most competitively balanced conference. With that kind of competitive balance you end up with a lot of close games that end with a lot of FT's.
Kansas won the Big 12 regular season title and lost in Conf. Tourney Finals to Texas. Kansas played 22 total games against their Conf. Mates. In those 22 games Kansas went 16-6. Kansas outscored their opponents by +2.9 pts/game.
BYU for a comparison went 9-10 in 19 games against WCC Teams. Yet BYU outscored their opponents in those games +4.4 pts/game.