The argument about looking good on a bad team might generally be true to some positions where players can rack up a lot of tackles, like strong safeties, LBs and some linemen spots. Or in the case of yardage for WRs, like some believe RW to have done in Detroit (even though I don't believe this to be the case).
However, when it comes to CBs and FSs, this is most likely not true. Bad teams don't usually get a lot of ints, because pressure is a huge part of that. Also, they don't get a lot of throws (and even more, predictable throwing downs) because teams can run on them all day as they usually have bad run Ds and are usually down by a lot. These teams also tend to overcompensate for the shoddy run D by moving the SS into the box. This puts a lot of pressure on the FS and the CBs.
Having 8 ints in one season on a bad team is nothing to sneeze at. A stat I looked at said is turn over rate was only one short of Ed Reed in his career. That's pretty impressive.
I just went back and watched our 2 games against the Rams in 07 and 08. He had 3 picks against us in those 2 games. In 07, the only play of significance that I saw him in was his int on an underthrown ball by Romo. I also blame the route combo partly for this because we had 2 WRs (Crayton and Owens) running 9 routes on the same side of the field, so it was easier for Atogwe to track the underthrown ball down.
In 08, his game added to my point about playing on bad teams. We had to throw the ball a lot in that game, due to being down big, and they got a lot of pressure on us. He had a near pick early in that game. He had another pick of number 50, defending Jason Witten on another poorly thrown ball that he tracked well. Then he had a GREAT pick defending Terrell Owens on a deep route on another poorly thrown ball. There were also a couple of occasions that I saw him with good coverage on Witten; one of them was on a dig and deep route by Witten in which Brad threw the ball to Owens instead.
Bottom line, with our pass rush, I don't see an 8 pick season being out of the question and a couple more turnovers. The downside I saw to his game though is that he's a poor tackler. He was even shaken out of his cleats by Barber. He bounces off tacklers too often and is not physical. There were a couple of plays where he blitzed and just tried to avoid the blocker with a shimmer move.