I voted for "not really, but I would start him." I think he's good enough to make it work, but that it might be a bit of trial-by-fire. That said, I think part of why I voted that way is because I have a juvenile urge to see him play. I think it would be cool. Which of course, is a completely stupid, idiotic, asinine reason.
I think what's most likely to happen, SHOULD happen - Geno's okay and he'll start. As much as he's struggled without Rodney with him back there, it's a little tough to go with Sanders AND a rookie to start the year - tough mentally on ALL of the defense, especially in the opening game.