We all know the IMC on the Lynnfield is better than the memory controller on the Clarkdale chips because the Clarkdales are not integrated on the die.
Anyway, I've just moved from an i3 530 to an i5 750 and....the memory performance REALLY is massively better.
I'm not that surprised by it but I thought it was interesting
Here's a quick comparison as to how good the IMC is as opposed to the separate IMC on the i3 530.
i3 530 on the left, 2030MHz @ 9,9,9,27 (everest displays clarkdale timings wrong), i5 750 on the right 1000MHz @ 9,9,8,26.....