Grahamjs

I zoomed in on the VW bug's rear as a comparrison and checked the RAW quality at all ISOs with that of the E-M5 and the Panny GX1 and found very little difference if any up to 3200. at 6400 and 12800 the E-M5 is ever so slightly better. Not enough to make me want to swap my GX1 and certainly not the step up that all the early rumours were suggesting.
In any case, neither of them can hold a candle to my Nikon D700.
I will be very interested in a comparrison of the D700 and D800 when one becomes available.