I think it all depends on how long it takes to unload the remaining 06 models. Remember, the price is dropping because the car has depreciated already, and it means that the car will plummet the moment you drive it off the lot. This is why the deals are so great. Those who wait simply save because they are buying a car that's become a year old in the market the moment you drive it off the lot. By January, the deals might get a bit better, because the car will depreciate more. My guess is that this car will be like the RX8, in the fact that due to the low demand, the depreciation is fast. For someone who plans on keeping car a long time, the deals work out great.
For those who swap cars often like I have in the past, it doesn't work out. I'm gonna be keeping my car until the warranty is gone, then likely trade it in, unless it gives me 0 problems after 50k miles, and doesn't have to go to delaership for problems or repairs. The reliability jury is still out on this car, so we shall see how it holds up.
Unfortunately, these great deals mean the car will lose it's value faster then those buying cars such as a Legacy GT, or an STI, so without keeping car at least 4-5 years, you really don't benefit all that much from these incentives. I paid $29000 for my 04 STI, and put 28k miles on it, and got $23000 for it on trade in. I also got the Speed 6 Sport for $24500 on a lease buyout option in the summer at 5.02% interest. For that time, it was a fabulous deal, but I know I will lose a lot more money on this car because the market value is far lower, so I'm keeping it.