Dude if you want to make claims of incompetence do not include Naughty Dog, a flipping first party developer that BELONGS to Sony, in your list. And it is well known that developers of all sorts spoke out heavily against Sony's use of the Cell Microprocessor. I'm a little disappointed that it didn't catch on since it looks like it could have been an amazing tech if developed more and adapted better, but a lot of what it does better can also be handled well by GPUs which I think is why it lost it's allure. Back to the point, although a lot of what you say has some credit, you can't include a first party developer. It's their job to know the tech inside and out. It's also worth mentioning that the 'ICE team' are based in the same offices as Naughty Dog, these are (I might be wrong here) the engine support guys.
Also it's worth mentioning, and I might just be super lucky here, but I did not suffer from ANY issues with FO3 and Skyrim on the PS3. New Vegas I played on the PC cause I wanted to try the mods, but the other two I played exclusively on the PS3 and they where fine.
EDIT: Just to mention that me saying 'flipping' is not meant to insult you or Naughty Dog. In fact Naughty Dog are my favourite devs, played there games since Crash Bandicoot 1, and they are among a very few developers where I can trust the game they develop WILL be good.