What are we descussing? Are we discussing the importance of dynamic range? Really?
Let me summurize this whole 1000-page discussion with a few words,
dynamic range is one of the determining factors of high image quality, just like resolution, colour, noise, and lack of artefacts,
So, it is very important.
But, recent digital camera have reached a very high level of dynamic range that meets the demands of most prfessional photographers, and therefore they don't look too much into it and come here presenting their arguments of the lack of importance of high dynamic range,
it's their type of shooting and their jobs, Canon DSLRs offer more than they need of image manipulation in post.
AND, there are those who do specific work that requires the highest dynamic range possible, people who shoot HDR in very high dynamic range scenes like landscape photography, and interior photography, these professionals find Canon DSLRs behind the competetion here and are slightly frustrated,
SO, we have two types if shooters, those who need it, and those who don't, we should respect each other jobs!
As for Canon cameras, they offer the exact same dynamic range as Nikon/Sony DSLRs in the APS-C range and lower, with very similar resolution, noise, colour, artefacts, I can prove this with actual photographs rather than DxO numbers,
BUT, in the full frame range, Nikon cameras have more dynamic range and highlight/shadow recoverability, and significantly higher resolution too in that specific 36 megapixel sensor made by Sony.
It's just the current situation, accept it and chose what fits your job and stop fighting over it.
Canon and Nikon always exceed each other and that's always good for the competetion, for example the 5D mk II generation of Canon cameras had better image quality than Nikon D700 with more DR, signifcant resolution advantage and higher image quality, then the situation turned around, and then it will turn around again,
The canon DSLRs first video cameras had significantly better image quality in video mode for about 5 years straight, then with the Nikom D5200 the situation turned around, and Nikon is now offering higher video IQ,
it will always be that way, with each company offering advantages, for example get me a Nikon that can shoot 10fps with 65AF point and state of the art build quality for less than 2K,
it's a never-ending battle, and the leap-frog race continues, while idiot fanboys clap and dance each time their frog takes a step ahead, stop being ridiculous and go out and shoot.
I am waiting for the Canon DSLR that has high resolution and high DR that competes with that specific Sony sensor, while you wait for your Nikon D300 successor, it's fine, just stop fighting over it!