The last thing I'll say about this new standard/premium car debate is this:
I would have much rather seen PD go with car models that are not as "over the top" as the premium models, but closer to what Prologue offered. Maybe a bit higher than the cars in Prologue, even.
400 to 500 cars of that quality would, in my opinion, have done the game much better than the whole standard/premium car thing...
It's just personal opinion, but I don't see it as a good idea to create cars that are so above everything else that they're getting in the way of the game itself. It's cool to see every screw and the stitching in the interior in photo mode, of course, but that doesn't really sway my opinion.
Add to that that the list of premium cars in GT5 is, well, a bit sub-par* in my opinion and I guess it's not hard to understand that disappointment is felt by quite a few people about the whole thing. After all, the standard cars not only look inferior, but also are inferior in terms of features.
To me, the standard cars are testimony to a decision and course of action I can't really agree with.
*I don't think it offers the diversity I would've liked to see and there seem to be lots of very similar cars. The SuperGT cars would be an example of this, or the different versions of the R35 GTR or the Miata, plus those valuable slots given to, say, the Prius. This just hurts the overall car list more than it would have if there were 400-500 cars, as the total amount of desirable cars diminishes a bit more in comparison, in my opinion.