Examples from the Canon 1D MkIV (MK IV photo taken on the MK 3)
The answer after a weeks worth of putting the camera through its paces is most definitely yes, it is not really fair to compare a pro spec camera against the 5D MK 2 but truth be told when Canon made the Mk 2 version of the 5D they didn't expect professional photographers to abandon the full frame 1DS Mk 3, at a third of the price and with the addition of HD video it was a bargain and although its lack of focusing points, a measly nine and inferior build quality it was still a good all rounder. The MK 3 version of the 5D is due out in Autumn and is looking to be a great model. Anyway back to the MK IV, the samples you see are of a portrait enlarged by 100%, sharp and as clear as anything, so at ISO 125 its great, what about further up the scale? The image of the lens cap is taken at ISO 12400 and is staggeringly clear, their is a little noise in the background but this is a usable image which hasn't even been processed yet. I actually think that the ISO is improved against the 5D which is testament to how good this camera is, the autofocus system has nearly seventy custom functions which takes a bit of getting used to so that you can tailor the camera to your shooting requirements. All in all after a weeks use it is superb and the quality of the 3" clear view screen is superb, the best I have seen on any camera to date.