A bit off subject, but I've seen this "high scoring conference" a few times and, while it has been the case in the past, it is not the case this year. Currently the SEC is the high scoring/no defense conference. What I haven't figured out yet is if that is due to playing styles changing or because of scheduling.
Currently there are three SEC schools in the top ten offensively and zero Big 12 schools. The top two Big 12 schools, by yards per play, are Oklahoma at 17 and Iowa State at 23. For comparison, A&M is 28th and Texas is 30th.
Defensively, the SEC is a bit worse at giving up yards this year, averaging over a half yard more per play than the Big 12, which amounts to about 70-80 yards of extra offense per game, give or take. On the "how could this be!?" take; LSU, Arkansas, and Ole Miss are all giving up more yards per play than Kansas. Ouch.
On the flip side, defenses in the Top 50 of yards per play, give up around 5.4 y/p. 21% of the SEC is represented (Alabama, Georgia, and A&M) while the Big 12 has 60% (WVU, OU, OkSt, ISU, Texas and TCU).
So, either the Big 12's offenses suck this year or they have learned to play D against the spread. Or, the SEC is unable to stop the spread or is having a down year defensively or playing 10 conference games instead of 8 skews the numbers.