its not you, they are clean. frankly, i was amazed at the jpeg results i got at high iso's with this camera. very comparable to the now iconic x100, that i also have. believe it or not, imo, it is actually IQ at base iso that i think could be better. perhaps its because i keep comparing to cameras without AA fliters, but at base iso, theres a lack of clarity or crispness throughout the image that i see from the M8, GXR, fuji etc. but at high iso, amazing!
tony