As previously noted, there is no simple measure that consistently predicts college football success. We lean on returning starters most often -- it matters, of course, just who those returning players are -- because we typically value experience.

There's good reason for that. Experience matters. While it's not more important than talent, it often overcomes talent.

Another way to measure a team's experience is to look at returning "lettermen," who are loosely defined as players who contributed during the past season.

This is what Phil Steele does here. Of course, he also notes that each program defines lettermen differently, so he defines his measure in a percentage of lettermen returning.

And, by this measure, the Pac-12 isn't terribly experienced heading into 2014.

Last year -- one of the deepest in terms of quality in conference history -- 11 pac-12 teams ranked among the nation's top-65 (top half, really) in terms of experience. This year, just five teams do, and six rank between 85th and 124th.

Does this mean the Pac-12 should expect a downturn in 2014? Not necessarily.

For one, 10 Pac-12 teams welcome back experienced QBs, and half of those are all-star prospects as well as NFL prospects. That's almost always a benefit. No other conference even approaches the quality the Pac-12 will have behind center this fall. Further, as we've show the past two days -- here and here -- there's a strong collection of offensive line talent coming back. Finally, one of preseason themes is the depth across the conference at receiver.

What I think we'll see this year in the Pac-12 is a step back on defense and -- not unconnected -- a big step forward on offense, particularly the passing game.

Whether that translates to nonconference and bowl wins and, perhaps, success in the inaugural College Football Playoff remains to be seen.