The Allas Cowboys?

Disclaimer: I didn't get to watch yesterday's game with the Lions. It was the first game I have missed this year. So this post is based on what I've read and what I heard from Brad and Babe on the radio.
Here is the premium money and draft picks that the Cowboys have spent on their defense:
DE: Marcus Spears- 2005 1st round draft pick, Chris Canty- 2005 4th, and Jason Hatcher- 2006 3rd
DT: Jason Fergeson- 2005 free agent
LB: Greg Ellis- 1998 1st, DeMarcus Ware- 2005 1st, Bradie James- 2003 4th, Akin Ayodele- 2006 free agent, Kevin Burnett- 2005 2nd, Anthony Spencer- 2007 1st, Bobby Carpenter- 2006 1st
CB- Terrence Newman- 2003 1st, Anthony Henry- 2005 free agent
S- Roy Williams- 2002 1st
Not mentioned failed high picks like Dewayne Goodrich, Ebenezer Ekuban, and Tony Dixon.
They even hired a defensive guru coach in Wade Phillips. In fact, the last three head coaches have been defensive guys.
But then against one of the worst running offenses in the league and after a week of whining about something a 2nd rate quarterback said a year ago (after he had torched a playoff bound team for 300 yards and 4 TD passes), the D was gashed for 400 yards of total offense. John Kitna was the most sacked QB in the NFL, but the Cowboys hardly touched him and caused 0 turnovers. Kevin Jones averaged 4 yards a rush and Kitna completed 35-44.

The Cowboys have a strong offense. So strong that it overcame a fumble on the 1 yard line down by a touchdown and still drove down and won the game in the end. And it looks like that offense is going to have to carry this team as far as it will go. I mean, do you feel good about this defense against the Vikings again, especially when they have Adrian Peterson and Tavaris Jackson seems to have found himself? What about the Giants or the Packers again? I'm not preaching doom and gloom yet. But this defense needs to step up if the Cowboys want to do what they said they want to do. Their goal isn't the NFC East title they clinched yesterday. It's the Super Bowl.
This win falls in the same line as the Buffalo game: A game they should have lost, but won anyway.
Glass half full? This team has guts and never says die.
Glass half empty? This defense is a sieve and will inevitably keep this team from it's goals.
Which one is it?