That is part of their design and fully intentional. You will see the same thing with any monitor that is actually showing things properly. If the banding wasn't there then you should get worried.
Besides, this has already been explained couple of pages back.
I'm getting horrible banding on the gametrailers website, but it's part of their theme (on purpose) not the monitor's fault. Similar results with GameSpot, however it's much less. Don't really see any banding at all.