On KSR, Rashawn Franklin ran across a treasure trove of information regarding Stoops defense and defensively philosophy. The information is quite lengthy, especially when you follow all the links, but if you read through it all it will give you an enormous amount of information on what we hope to expect from our defense. Not only does it cover his defense but also defines and clarifies a lot of defensive terminology.
Making it through this information will require quite a bit of time and several iterations and when you're done you'll qualify to be on his staff. The beginning of the Final Thought section puts it succinctly "If I could summarize Stoops defensive philosophy, it would be to be extremely assignment sound by virtue of stressing fundamentals and details". Sounds like a great goal for our defense. I'm pumped.