This is, after all, why many photogs embrace HDR.
Exactly my point - you don't need the camera to provide 6 stops of adjustment.
I think it is good to keep this point in mind. The fact that there is a work around—and with the HDR feature on the new 5D3 perhaps a relatively easy one—means that with some degree of extra effort whatever DR one needs is available to 5D3 shooters. (To be clear, when I refer to the "HDR feature" I refer to the fact that the 5D3 may be able to effectively capture a group of appropriately bracketed RAW images with minimal effort.)
And I'll reiterate: how much you can get out of the shadows depends massively on the choice of converter, and some people just aren't prepared to put the effort in to find the best converter for all their needs.
If you need deep shadow recovery without banding, use a converter that can do it. They exist.
The DR limits being calculated are irrespective of any RAW converter. So maybe there differences between RAW converters but lets be clear that the difference in performance between a Canon and Sony sensor is not about the RAW converter being used. It's a real, quantifiable difference.
Now this is not to say that one RAW converter won't handles shadows and banding better than another. However the choice of RAW converter is not simply about output; it's also about workflow. LR users have potentially invested thousands of hours creating a catalog to manage hundreds of thousands of images. Switching converters can be like switching camera systems. It's not something that can necessarily be done on a whim.
It's a damn' sight cheaper than jumping ship, and a damn' sight less stressful than the photographer wasting his life away waiting for Canon to produce the perfect camera.
Maybe I'm unusual in this, but I actually enjoy the challenge of finding solutions to problems: it's a far more productive way to use my time than endlessly complaining about this thing or that on internet forums.
Like many others involved in this discussion, I've got a 5D3 on pre-order; I'm not wasting my life waiting for a perfect camera. And I don't consider most of the posts in this thread as complaining. It is threads like this on forums like this that raise awareness of issues with other users and even sometimes with Canon. Case in point: If you shoot video at all, you know that hundreds of threads like this related to the crippled video functionality of the 5D2 at its introduction (no manual control; a single odd frame rate) helped push Canon to make the changes necessary to turn the 5D2 into a professionally useful tool for video.