Yeah, the secondary got shredded by DeSean Jackson twice, but the game was lost in the Cowboys' front 7 on defense against McCoy and the Eagles' running game.
With 4:22 remaining in the game, the Cowboys pulled to within three points of a tie on a Jason Witten touchdown. With a defensive stop, the Cowboys not only had enough time to tie, but also go for a win -- effectively hurting the Eagles' NFC East standing.
McCoy was bottled up in the first half, plain and simple, where he had just 15 yards on six carries. That's good run defense. Then, the second half happened.
McCoy rushed for 134 yards on 10 carries in the second half and iced the game on the Eagles' final drive when Dallas just needed a stop to get into David Buehler's field goal range to tie the game, or possibly even win it.
On that final drive, McCoy did all the work. He rushed for 6, 12, 20 and 12 yards. Then on third-and-1 with the game on the line, McCoy gained six more yards to end the game.
The defensive front did a great job disrupting and harrassing Michael Vick all night. Vick took some shots. But when it mattered most, that same front couldn't bottle up McCoy, and it cost the Cowboys a chance at winning the game.