Great point.
Also, in fairness to this year's offense, they really have played against a run of teams with very good defenses so far.
http://www.espn.com/nfl/statistics/team/_/stat/total/position/defense
In per game yardage rankings, Denver, Cincy, Carolina are #1,#2,and #4 in the league. Atlanta is 10th. Jets are only below average team they've faced at #25, and the Bills ran the ball plenty well on them while still adjusting to a brand new scheme in week 1.
Let's see how they do in the next several weeks against considerably lesser rated defenses before completely panicking.
Tampa #30, Oakland #23, New Orleans #26, KC #29, Jets #25 again, Indianapolis #31, Chargers #18, New Englandx2 #32...
The Bills' remaining schedule includes FIVE games against the WORST FOUR yardage defenses in the league.
Only Miami at #11 x2 is a better than average defense still on their schedule, and most are much worse than average.