I know, it's an obvious, slightly redundant conclusion. But this article from Football Outsiders is something we should all take note of, or at least read.
Believe it or not, the Falcons generated a decent amount of pressure last year. Our defense generated pressure 26.4 percent of the time - 8th best in the league. But it wasn't the right kind of pressure; it wasn't the kind of pressure that makes your defense more efficient. In other words, even when we generated pressure, we didn't do anything construtive with it.
On the other end of the spectrum were several defenses that got a smaller efficiency premium from pass pressure than other defenses did in 2011 (e.g., Atlanta).
In fact, we were the least efficient team in the league when we got pressure. Why? Because we hurried QBs but didn't get the sack or affect the offense in any beneficial way. No bueno folks. No bueno at all.