I use auto-ISOs so don't see what the fuss is about. All of Canon's gear is rated for ISO 9001 at least, check the following link:
The fuss is about when you are comparing high iso ,noise, resolution the parameters must be the same, and Canon has a tradition to need longer exposure time even if the ISO and target is the same. If you are shooting sports, flying birds it is easy to understand that 1/1600sec gives better results than 1/790sec.
But Canon is guaranteed to ISO 9001, those shots are only 6400? My Canon goes to 25600, although I've never used that setting in case it's against warranty to exceed the guaranteed amount. Plus for birds and sports you can just wait for nesting / half-time etc, so I still don't see your point.
The point is that you can newer compare to different cameras and not have the sam time / f-stop and that Canon needs more lights in a given situation as you can se from the pictures before and from I-R
AND when the discussion started some people claim that 5dmk3 had better high iso qualities, and I said no, not with the same parameters and the pictures are presented in the same size. After 12800iso the d800 start to loose in comparison to 5dmk3