WilliamWatts on 23 February 2010
They haven't just flipped a switch and poof theres another 70MB. If you'd followed the technological story since release they've been slowly slimming down the operating system. I suspect its less optimisation for the most part (though still important) but more an acknowledgement that they needed to allocate with-held ram to their game designs in order for games to reach parity with the Xbox 360 which already had a lot more ram to start with.
