I got the same numbers today from my dealership. $1350 with $5k down and 36months. I was expecting it to be closer to $1000 so I was really surprised.
As far as the R8 goes, here in Miami its selling for around $160,000. Sounds to me like $2400+ would be more in the range for one of those.
I also looked at an 2008 z06 for comparison and it was almost the same thing, even less. Obviously not paying dealer premium for the z06.