I searched a bit over the internet and didn't find anything concrete, just speculation. I only see two reasons for potential delays:
1) Still too many C6's out there.
2) Production problem (one or more component giving issues or a bad batch of parts). It is better (and also the right thing to do) to delay production in this situation.
If there are too any C6's out there sitting at the dealerships, we will likely see a 0% 72 months financing on all C6's along with another pricing promotion. Last time I checked it was at 1.9% 60 months. So, I wouldn't stress out either way. They will give us our machines soon (I hope). I can't certainly wait until 2014 as some people were saying.