Sure but it isn't about stopping every third down.
Except we weren't stopping them on *any* third down, including very long 3rd downs. At one point they were what, 7 out of 7 on 3rd down as Dooms noted? That's not acceptable performance from your defense. You are going to give up some third downs. We were giving up EVERY third down. And it almost cost us the game. If we don't get that Eli tip ball pick, getting 21 points hung on us in the first half on three consecutive TD drives would have done us in. We have got to generate early pressure on third and long in order to force a quick throw - and how many times did it look like we'd stop them with contact before the sticks but they still managed to get there? First three drives were demoralizing.
Thankfully, we rallied with that last stand on 4th down. Thing is, we don't have to stop on them on 3rd and 2 and 4th and 2 if we could have stopped them in the first half on 3rd and 12... perform solid early and you don't have to perform heroics late.