Nice. Thought about posting that as well. They basically described ISU's defense exactly how I did after their week 0 game against K-State.
They have a lot of similar principles to Iowa, just under a different scheme. They're a no-name defense that sees all 11 guys working together to accomplish a goal and their system is developed enough over the years under their DC, that it is becoming highly successful at the college level.
But make no mistake, ISU, on both sides of the ball, has become a "system team".