Are we discussing the same game? GT6 literally has hundreds of "duplicates" (copypasted cars that are different in name only) and still advertises that game as having over a thousand cars, despite that 2/3 or more of them were made for the PS1 and PS2 versions (N64 era).
Those two facts alone show that PD still mostly goes for quantity. A developer that goes for quality wouldn't even think of having in their products content that has been criticized by every reviewer on the grounds that it greatly diminishes the quality of the game as a whole, let alone actively base their marketing in the exaggerated car numbers those said two accounts produce.
Not only that, third and fourth facts are that you do know GT6's "premium" car models aren't the best in the business, as in most detailed, and that the tracks aren't as meticulously made as those from PC sims are, including modelling a perfect layout and including all elevation changes and bumps in circuits. This means that even in their better quality current efforts PD still takes compromises.
Heck I don't know why I even wrote this post, as the already posted pictures in this thread already speak for themselves. They show that 2/3+ of content in this 2013 game is at least 10 years old, which is an eternity in a videogame and that alone proves what PD goes for in 2013.
The only thing to be added is that....well, Kaz said those 2/3+ of inferior content are still going to be used in GT7, a 2015 or later game. That's not going for quality; in fact if that happens that will mean PD will become the AAA developer that goes for the lowest quality of the whole industry.
With all that said, what's the bigger picture then? GT7 will only have inferior content than what the industry already uses today, and, more importantly, most of it will be two or three generations old. What facts show is that PD loudly talks about quality, but when you see their actual products they feature the opposite.