what the heck is so hard to understand... standard cars are THE SAME CARS from GT4 with the SAME LOW POLY MODEL + some textures on, and no cockpit. On the other hand, premium are the HIGH POLY CARS with HIGH TEXTURES and DETAILS. So don't expect much more from GT4 cars(standard in GT5) than a good anti-aliasing and maybe some good shaders compareble from those in GT4. The damage on standard cars will be made just from some shadow texture that are ment to "trick" your eyes. Nothing more, nothing less. BUT on the PREMIUM cars there will be some real deformation polygons and some very good textures(normal maps i guess) that will make cars feel almost perfect, like in real life.
I am pretty sure there will be some dlc after the game launch with more premium cars. So stop whining please...
Oh.. and for those "forza 3 whining boys" you should known that the forza 3 developers modeled their body cars with laser tehnology, which is way faster than hand craft-made models that GT5 producers worked on. Please, never compare forza 3 ******, crappy, low resolution mapped looking cars with premium gt5 cars. These people from PD that worked on GT5 put much, much more effort in understanding cars geometry and interior and that makes them very good 3D artist, not like those guys from turn 10 studio that make the job just for some money. You know, this game is something about passion, dedication, and attention to details...