Meh. Remember . . . when Jones was sucking last year it was largely due to the fact that they didn't have a QB to stretch the field, or WRs to catch the ball. Last year playing at home vs the Rams (with Hass under center) Jones had 144 yards from scrimmage and a score.
Here's what ESPN had to say about Jones.
A few things we want you to keep in mind: One, he's in Gregg Knapp's offense, and Knapp was known for heavily using his running backs in his Atlanta days. Two, even if Edgerrin James steals carries, James didn't get a full preseason to adapt to the offense, meaning he might be worked in slowly, granting Jones the bulk of the September work. Three, and perhaps most important, St. Louis' defense ranked 29th against the run in 2008. Go nuts.