Also, the next 2 months will be filled with games. I KNOW that an RPG can't be compared with a 4X game, but 60 dollars look like 60 dollars whatever you buy.
With Elder Scrolls 5, The Old Republic, Arkham City, Sword of the Stars 2 and Anno 2070 we already have a plethora of games that will require loads of hours to be completed, which means that people won't feel the need to buy something new AND won't have the budget available.
I would fear a release date near the beginning of december, because Sins would be easily forgotten among those beasts.
On the other hand, though, there's X3-Rebirth right around the corner, and that's another huge competitor in this field.
Thank God I'm not the poor soul who must decide Rebellion's release date.