Right, this is why is fairly obvious you don't know what you are talking about. Even talking about a memory footprint for a kernel may not even make any sense accept for the footprint of the code which is sure as hell not 70-80MB. You can access whatever you want in a game, but it's not going to be brought into memory until it's needed.
You don't know what these people mean by OS or footprint. They may not even know. You don't know if you are comparing the same thing between the 360 and PS3. Both numbers obviously include helper libraries and may or may not include other applications. If the XMB is included the number for the PS3 is going to be meaningless as it's fairly obvious if you've ever used one that the XMB is swapped out when you are in a game.
alenphnull, there is nothing else I can or will say. I have already stated my claim that is backed up by dozens of news sites, Sony itself in the interview I posted earlier, Neogaf/Beyond3D developers that have actually worked on the game, and my old contacts back in Bethesda. The evidence is there, it is yours to believe it or not. Go to a forum in which game developers actively post and ask them that question. Heck, spent 5 seconds Google searching it. You will have your answer.
If you wish to talk about something else, I am more than happy, but I am done having this discussion with you.
Good news Everyone!
I've invented a device which makes you read this in your head, in my voice!