No, it's a clear and obvious fact, actually.
No. All you are actually doing is suggesting why GTPSP looks the way it does because of an
assumption that you made based on the final product rather than anything we actually know for sure about the development. An assumption that is true to an extent, but the extent itself is what is unable to be proven.
Ignoring obvious hardware specification comparisons, it doesn't look as good as GT4, does it? Why? If the PSP hardware is not the limitation, then what (in your grand opinion) is?
My "grand opinion" isn't based on any more facts than yours is, and I've already stated such. The difference is that I'm
not the one walking around saying that my suggestion
is the only reason that GTPSP is the way it is.
Is it
possible that GT PSP's graphical deficiencies were a result of the PSP's own technical limitations? Yes, and that definitely was the case. At the very least, GTPSP would never have looked as good as GT4. Common sense tells us that.
However, is it a proven fact that it was the
only reason for GTPSP's graphical deficiencies, and that GTPSP
couldn't have looked any better considering the hardware? No.
For example:
If the PSP did not limit them, we'd have 5, and real time reflections, and nice textures, and and and and!
There are
several other things that could have limited GTPSP in these areas that are completely unrelated to the PSP's capabilities on the hardware side.
Unfamiliarity with the the hardware, a rushed development cycle and developer turmoil are just a handful of the things that by themselves could have led to the same situation outlined above, and what little we do know of the game's development pretty much explicitly says that PD had trouble with
all three of those things while the game was being worked on. This was a game for a system PD had never even touched before (unfamiliarity), with a set-in-stone release date (rushed development) that gave PD so much trouble in developing that Kaz had to reassign most of his developers away from GT5 to work on what is essentially a cash-in side game (inner turmoil). I don't doubt that the PSP's limitations had something to do with the game as it is, but that doesn't mean that the final result is entirely because of those limitations; and we simply don't know how much of the GTPSP final product actually is due to the limitations.