Olympus can't get high ISO right ever I think.
We have been seeing snapshot size samples and people claiming good ISO 1600.
But look at the 100% crop. This is bad!
MY 2 year old canon does 2x better!
E-3 + PhotoAcute at 1600 ISO... (pics): Olympus SLR Talk Forum: Digital Photography Review
Of course the scaled down looks good, but then 100% or 50% crop is where the pudding lies