People may also notice the primary reason the hdd went to 5400 rpm is because the hdd went from a 3.5" desktop size to a 2.5" laptop size.
That + non-upgradable memory = FAIL.
I am not going to argue one way or the other, but I am genuinely curious about this. I wonder how many people, apart from a couple of thousand people that frequent forums like these, would ever considering upgrading the RAM in their iMac anyway.