I know you’re not going to agree with me, but after Baylor & TX, the Big12 is not a very strong conference. The SEC, ACC & PAC12 will all send more teams to the NCAA tournament than the Big12, which may not even surpass the number of teams from the BIG.
First, it is silly to look at raw counts of teams going to the tournament. The Big12, despite its name, has only ten teams. The SEC has 14 and the ACC has 15 teams.
On a percentage basis, if Creme is right, then the other three conferences do have a larger percentage, but the margin baroows considerably.
Plus, it is well-known that the NCAA loves the SEC - they invariably get teams in that fall on their face, so I wouldn't assess the SEC strength on the basis of the NCAA love.
Creme only has four teams from the B12 going.
TCU, who has been getting votes in the top 25, isn't one of them. How many times are there teams getting multiple votes in the polls and don't make it to the tournament? And Oklahoma, has a higher rating than TCU.
I suggest that a better measure of conference strength is the number of teams in the top 50. A nice round number, and includes the NCAA field, plus a few bubble teams.
Six of ten B12 teams are in the top 50. That's 60%
The SEC has 7 but with 14 teams, that means they are well behind at 50%
The ACC is slightly better, with 8 of their team in the top 50. 8 out of 15 is 53%. Better than the SEC, but not in B12 territory.
The B10, which you didn't even mention, has 8 of their 14 teams in the top 50 for 57%. They aren't so well represented at the very top, but this metric has them better than the SEC or ACC.
The PAC 12 has 7 teams in the top 50, but with only 12 teams in the confernce, this works out to be a more respectable 58%
Which means based upon this plausible metric, the B12 is stronger than the B10, ACC, SEC or PAC12.