I always like looking at Football Outsiders' Advacned Stats, because they paint a much more accurate picture of performance than any other outfit -- they adjust for opponents, league averages, etc.
Although there are a ton of different statistical categories available, the one I think is most telling is "Drive Stats" (http://www.footballoutsiders.com/stats/drivestats).
In the offensive section, we're 29th in yards per drive, 21st in points per drive, 3rd in turnovers per drive, and 24th in field position. In the title, I said that our offense is "about as good as the Jets" because if you adjust yards per drive for turnovers (they have 2x as many offensive turnovers as we do) -- we're about the same; basically, I converted turnovers into average net punt for that team (since if you didn't turn the ball over, at a minimum you would have punted the ball away).
The Jets are a stout defensive team with a so-so offense -- we're the same build... and I'm happy with that.
Looking at Defensive Drive stats, we're 6th in yards allowed per drive, 4th in points per drive, 3rd in TDs per drive, 22nd in turnovers per drive, and 10th in opponents starting field position. The Jets are 4th, 2nd, 12th, and 10th (respectively). In Net Drive Stats, we're 19th, 12th, 9th, and 17th -- the Jets are 14th, 6th, 11th, and 5th.
Pretty similar stats -- although the Jets are forcing 43% more turnovers per drive; more veteran (and confident) defenses force more turnovers, so I expect us to improve in that category as the season goes on.
The one stat that concerns me for this week is average starting field position. The Falcons are literally crushing the rest of the league in field position #1 in field position, #1 in field position allowed, and #1 in net field position: they're averaging 13.6 yards of field position BETTER than their opponent on every change of possession. We, on the other hand, average 2/5ths of a yard better than our opponent per possession change. With a league-wide average of about 15 possession changes per game, that's 105 yards of net field position for the falcons (assuming our net and their net are averaged out equally).
-- The last time I saw such a lopsided field position game like that was out battle down in Miami last year -- where we got smoked for -126 net yards of field position. The rest of the game was completely even. We stalled midfield twice and were forced to go for the TD at the end of the game. If we had better field position, we would have gotten a FG on one of those drives and could have kicked a FG to win the game. (http://www.nfl.com/gamecenter/2008121408/2008/REG15/49ers@dolphins#tab:analyze/analyze-channels:cat-post-playbyplay).
I think we're matched up pretty evenly against Atlanta -- but the field position game worries me a little bit.