Great Grantland piece on Chip Kelly:
The up-tempo, no-huddle offense ends up benefiting in practice as much as it does in games. Without time wasted huddling, players get many more practice repetitions, leading to increased efficiency on Saturdays. As Sam Snead once said, “practice is putting brains in your muscles,” and Oregon’s up-tempo practices are all about making Kelly’s system second nature.
When the games do begin, there’s no question that the no-huddle makes Oregon’s attack more dangerous, but it’s a common misconception that they have only one supersonic speed. The Ducks use plenty of their superfast tempo, but they actually have three settings: red light (slow, quarterback looks to sideline for guidance while the coach can signal in a new play), yellow light (medium speed, quarterback calls the play and can make his own audibles at the line, including various check-with-me plays), and green light (superfast).
This change of pace is actually how Oregon constantly keeps defenses off balance. If they only went one pace the entire game the offense would actually be easier to defend. When the defense lines up quickly and is set, Kelly takes his time and picks the perfect play. When the defense is desperate to substitute or identify Oregon’s formation, the Ducks sprint to the line and rip off two, three, or four plays in a row — and it rarely takes more than that for them to score.
Also worth re-reading last year’s Grantland piece on the Oregon-Stanford game. I, for one, am fairly convinced that Kelly has studied the work of John Boyd. See also Chip making the case against time of possession: