This is just a quick, informal comparison of high ISO noise on Canon 60D, Olympus E-M5, and Olympus E-PM1. All were taken using roughly equivalent lenses (Canon 35/1.4L and Panasonic Leica 25/1.4) at f4. The Canon was on manual WB while the Olys were on auto WB. Noise reduction, sharpening, and all those other parameters were all set to whatever settings I normally use, and everything was shot in JPG. (Hence "informal".) For me, the main takeaway here is that the noise control on the E-M5 looks at least as good as the 60D and is easily usable at least up to 3200 without worries. All the reviews have been reporting similar results, so it's good to see that it's really true.