This article from a few years ago is fucking awesome:
http://smartfootball.com/offense/the...sen-and-beyond
Particularly these 2 parts early on that really explain a whole lot about both big 12 offenses and defenses really simply:
Indeed, the coaches who’ve taught and learned the Air Raid have changed, the players and formations have changed, and even the plays themselves have changed. The offense, however, remains, both shaped by these coaches and their players and somehow shaping each of them in the process. The wishbone and the Wing-T were playbooks, Bill Walsh’s West Coast offense a meticulous method of gameplanning, but the Air Raid is something more akin to an idea, or at least several related ones: that to get an advantage in modern football you need to be particularly good at something, and to be good at something you have to commit to that something, and if you’re going to commit to something it might as well be different. And thus the principles underlying the Air Raid exist externally from the many coaches who have taught it: a diligent, many-reps approach to practice; a pass-first and spread the wealth philosophy; and, above all else, a willingness to live in the extremes, to do things just a bit differently, to be willing, in a game where conformity is king, to be just a little bit weird.That second passage in particular reflects a lot on the defenses; when there's guys like Crabtree and Dez and Blackmon and Maclin and Shipley etc. all over the place that are nearly impossible for college kids to cover in man, you end up with one simple option:These plays were almost not even plays at all, but concepts that serve as the building blocks of every passing offense. Gillman, decades earlier, had the simple insight that if one properly allocated receivers across the field at varying depths with space between them, no zone defense could cover them.
Although the offense only has five potential receivers while the defense can drop seven, eight, or even nine men into coverage, if the offense can always threaten both vertically and underneath, the field is simply too large for a zone defense to cover a well orchestrated passing attack. And if zone defenses could not stop such passing, then passing concepts could be constructed to also defeat the inevitable man coverage they’d face through the route choices that placed those receivers around the field. Defenses, in turn, would have to find ways to bring pressure to disrupt this design, and thus the cat-and-mouse game between offense and defense would continue on that basis.
Shrink the field with a deep zone and play man underneath when you can. Hence the bend but don't break mentality almost every team in the big 12 is playing with these days, and the fact that speed runners are starting to tear shit up.
XI Wiki



