This past weekend I was talking to the owner of a local Chevy dealship. He and about 200 other dealers throughout the country were recently invited to a preview showing of the new C6. GM trucked the C6 in, did the showing, boxed it up, and then immediately sent it back home - wherever home may be. Obviously, no cameras were allowed.
He's seen it first hand and said that GM did a great job comouflaging the cars we've all seen in various spyshots. Other than the frame the C6 is a completely different car than the Cadillac XLR. In comparison to the C5 it has a higher body line which makes the car look closer to the ground than it actually is. He also said that the C6 will have 435HP and one year later GM will roll out the Z06 version with over 500HP. That was about the extent of technical details that GM disclosed to these dealers.
I guess take this information with a grain of salt...