Upload & Sell: Off
Heh, and people are bitching about banding at 100! Yeah I found anything above 6400 to be pretty sad. Even at 6400 actually. Oh well, if I contrast it to my 1Ds back a decade ago, we've come a good way. It should be also duly noted that that last shot was a bit pushed.
I'll need to check my high ISOs more but in the quick 6400-25,600 test I did I was happy to see no banding at all on the 5D3 unlike the 5D2 so seeing all that in your 5D3 shot was a surprise, perhaps the type of lighting?
(In lower ISO I sure see it, surprisingly even at ISO800 or 320 and 640 a super easy way to make it show is to use flash for macro on a white or bright subject and then even a notch of shadow raise and the background is banding city, luckily in those cases when the background is that lost it's all too hopeless to rescue anyway so it doesn't really practically matter in that case, but it is a quick way to demonstrate it with basically zero to very small shadow lifting).