Sorry, but in most cases when I hear from people they set their PS3 to "RGB Full", they immediately disqualify themselves in terms of how seriously their "observations" can be taken.
Either they really know EXACTLY what they're doing (and have a display device that requires "FULL", such as PC-Displays) or they don't know at all, because most TVs and projection devices (at least coming out of the HT field) require "RGB LIMITED" to show the picture as intended.
Furthermore, for DVD and Blu-ray playback, the PS3's output signal should be set to "Y Cb Cr" (since that's the signal the discs are using) and superwhite on "ON" for best results and maximum compatibilty without black crush or something.
The problem is that a tousand people here use a thousand different setup combinations with a thousand different settings. Some people here really know what they're doing and how they have to set the parameters on their equipment to achieve the best possible picture, and some others just don't (no offense intended here!).
So OF COURSE everyone makes different observations and OF COURSE on some setups the PS3 performs well as an upscaling DVD player (when set correctly), and on other settings, NOT set correctly, OF COURSE it produces a rather sh*tty picture.
The fact of the matter is: When connected and set up correctly, the PS3 is indeed one of the best upscaling DVD-players.
I have a Toshiva HD-A30 as well and the two of them are incredibly close to each other when it comes to upscaling a DVD. The picture looks a little "different" on both of them, but in the end they both perform really well!
The only players that might be slightly better are the Toshiba HD-XA2 and the Denon 3930. But even there the difference is small.
@ Axatax: What "Secrets Benchmark" is that? I'm an installer myself, but never heard of that. I know the THX and Joe Kane Test-Pattern Discs and the German "Burosch" test-discs. Altogether they address most of the relevant fields in terms of picture reproduction.
What test patterns does that "Secrets Benchmark" contain and where exactly did the PS3 fail? I'd be very interested in that.