Shadows or not there are some very distinct matte lines around the car in some of the pics that suggest it has been edited in. The sixth pic is the best example of that and you'll also notice that the background can't be viewed through the windows of the car eventhough they're clearly transparent. You can tell by the lighting and reflections that it's not the same source material though - or at least it's been edited to look different.
Yes, I've noticed that later. Cars are obviously pasted in Photoshop. Also that light trail from the Lamoborghini looks cut off... And yeah, there's no AA on these shots, but the point was they are pretty much what he was saying for those old ones.