The Packers mostly rushed four today, sometimes three, they flooded the secondary, got three turnovers, and pitched a shutout on the road against one of the best teams in the league.
They blitzed a bit more against the Vikings than they did today, but it looked like mostly four man rushes in that game. The emphasis was on coverage, even on the final defensive stop of the game.
I think the blitz is overrated by fans, at least when it comes to the Packers, who are not a very good blitzing team anyway. If you can get enough pressure with three or four pass rushers to keep the QB from setting up in one spot and scanning the field for a few seconds at a time, you are usually going to be okay.
I started to really hate the blitz against the Redskins, when they got burned several times on blitzes, and the blitz has also made the defense vulnerable to screen passes this year. So I've been very happy that Dom Capers has dialed it down the past couple weeks and let the DBs do their thing. The coverage was fantastic in this game, and there was only one pass interference call (against Chillar). It was just one solid play after another from the secondary and linebackers.
An elite QB on a windless day may have been able to exploit the Packers' D today, but they played the perfect scheme for their opponent and the conditions. They won't be able to do this every week, but when it comes to the blitz, sometimes less is more.