Notable Week One Backs Under 4.0 YPC
Priest Holmes - 22 carries, 85 yards (3.9 YPC)
LaMont Jordan - 18 carries, 70 yards (3.9 YPC)
Edgerrin James - 23 carries, 88 yards (3.8 YPC)
Fred Taylor - 20 carries, 76 yards (3.8 YPC)
LaDainian Tomlinson - 19 carries, 72 yards (3.8 YPC)
Julius Jones - 26 carries, 93 yards (3.6 YPC)
Kevin Jones - 25 carries, 87 yards (3.5 YPC)
Jamal Lewis - 15 carries, 51 yards (3.4 YPC)
Domanick Davis - 14 carries, 41 yards (3.4 YPC)
Steven Jackson - 19 carries, 60 yards (3.2 YPC)
Curtis Martin - 20 carries, 57 yards (2.9 YPC)
Corey Dillon - 23 carries, 63 yards (2.7 YPC)
Deuce McAllister - 26 carries, 64 yards (2.5 YPC)
As you can see, Julius wasn't alone in posting disappointing week one totals. I think that the poor stats might be a trend for guys like Dillon, Martin, and Davis (who I've been skeptical about all offseason), but I think it's safe to say that many of the guys listed above will go on to have good years.
I don't think you have to worry about JJ. If anything, I think you should be excited about today's game. The Cowboys played great. If Bledsoe can continue to run the offense effectively and the defense can keep games close then Jones is going to have a big year (if he stays healthy).