I was alluding to the DR charts that are floating around for the 1DXII and D5. Look at these:
http://www.fredmiranda.com/forum/topic/1421137
http://www.photonstophotos.net/Charts/PDR.htm#Nikon%20D4S,Nikon%20D5
If these are indeed correct (don't look at absolute values, because there are...