Every multiplatform dev, yes.

Not first-party. Yes, it was hard to work for, but the other first-party devs learned it quickly.

God of War
LittleBigPlanet
Motorstorm
Killzone
inFamous

There were a lot of great games coming from first-party, it was only Polyphony that couldn't get their act together.

That's not good reasoning when you're talking about very different types of games.  Trying to divide Nurburgring into SPUs is hardly the same as getting an LBP level working.

As far as Killzone, even Guerrilla talked about how difficult the PS3 was to develop for:  "Problems:- Hard to program, especially at the start- Lack of instruction of data and instruction cache difficult- Basically impossible to use as a ʻnormalʼ core out of the box."

Naughty Dog isn't really a fair example, either.  They house ICE Team, which is one of World Wide Studios primary technology teams.  "While we were still developing Jak 2, Sony was already sharing information with us about the specs of PS3 and the legendary Cell Processor. In fact, we started a small R&D group called the ICE Team (which is still part of Naughty Dog today) to help experiment with different potential hardware configurations." (Link)  Mark Cerny has an office there.  “The team’s goal was to investigate advanced graphics techniques or other technologies, and also to build and disseminate various early systems that could be used as other studios began their preliminary next generation game development.”  (Link)  Naughty Dog is NOT a typical developer.

The end result doesn't identify the work it took to make it there. Every developer talked about the how the complex architecture of the PS3 was a nuisance. Good games being produced are just the hard work developers put in to work in spite of these issues