I was also one of the many who thought it'd be a tall task just to keep the defense from regressing even further from Shoop's wreckage last season. Improving substantially wasn't really in the cards from what I understood about how much production we lost.
It's still early. And we've yet to face several really good offenses. But I'll gladly say that, based upon early returns, I was way, way off. You can talk ball control all you want -- and it's good to remind everyone if they had forgotten that Leach's offense is not a hurry-up, no-huddle offense that wears defenses out with tempo -- but the fact is that the defense is just playing much better football than they were almost all of last year and that they're doing it with little-to-no depth and mostly unproven dudes.
Let's look super quickly at numbers. To try to reduce time-of-possession's influence, check out these yards-per-play stats:
Yards per rush allowed - 3rd in the SEC
Yards per pass att. allowed - 3rd in the SEC
Yards per play allowed - 1st in the SEC
That's strong regardless of who you've played or how much your offense holds the ball.
Also, it's not like we're playing our opponents worse than other teams. A&M averaged 6.8 yards per play against Vandy and 7.3 yards per play against Florida. Against Bama, they averaged 5.8. Against us they averaged 5.7. LSU averaged over 7 yards per play against Vandy and Mizzou, but managed roughly 5 yards per play against us. And Kentucky averaged roughly 5 yards per play against Auburn and Tennessee, and 7.6 against U. Miss, but managed only 2.96 against us.
Verification of the early returns comes from the FEI ratings over at Football Outsiders. It's too early for them to post detailed breakdowns, but right now we're 4th nationally among active teams in defensive FEI. (Offense's rank so far? 87th. Yikes . . . .)
Again, this is all very early and teams like Bama, U. Miss., and UGA will test our defense much more than teams like Arkansas and Kentucky. Our success on D will likely regress a bit as the quality of the offenses increases. But barring a complete and total defensive meltdown for most of the rest of the season (especially against teams like Vandy and Mizzou), Arnett's more than earned his paycheck and then some.