Ah, I find rather the opposite, while the jpeg Straight OOC are the best I have ever seen from my E-PL1 there are issues. Mottling in shadows, etc which vex me.
I have not yet tried RAW in m4/3 perhaps I should.
I do find the RAW files from my XZ-1 to be superlative.
I also suspect the lens on the XZ to be superior to any one those I have for my m4/3.