It may just be what the video shows and what they actually tested so again if I am wrong I apologize.
-Sorry for typos...
I did too...but I think Cinema 5d need to RE-DO the Dynamic Range test at the Correct ISO- This test they did is totally invalid its as guaranteed you loose Dynamic range when you go about the native ISO which on this camera the sensor is tuned to an exposure index of 320 I am sorry but I am very much convinced you'll will see much better results at the proper ISO value.
Why was the DR tested at 500 ISO....isn't the native ISO 320, am I missing something? I was taught that the best DR in any sensor happens at its Native ISO/ASA?