Those of us shooting Canon cameras have often looked to Sony/Nikon with envy when it comes to shadow recovery. Not only because Sony sensors seem to retain details better in the shadows, but also because when pushed, they didn't seem to exhibit the seemingly-Canon-trademarked banding pattern that has plagued Canon camera bodies.
So in the spirit of experimentation, I decided to subject my recently acquired 7D2 to a test. Those of you that find this test silly and useless for "normal" shooting, I agree with you, but that's besides the point. The fact remains that Sony/Nikon has traditionally spanked Canon like a red-headed stepchild in these situations and one cannot dispute that. Whether you care to push your shadows to the extreme is up to you.
So for my test, I shot the following scene at -3 exposure compensation at iso 100.
For fun, I decided to push the exposure in LR 5.7 by 5 stops (LR's maximum).
Zoomed in at 100% pixel peeping, we get...
Then I decided not only will we push exposure by +5, let's throw in +100 shadows and +100 blacks...
It seems to me that the kids at Canon have cooked up some notable improvements in how the shadows are handled. I am unable to provide a numerical value to this improvement, just an opinion from what I visually perceive. Does this mean the 7D2 can stand toe-to-toe with Sony/Nikon? I don't know as I don't have a new Sony/Nikon to compare it with. But my guess is probably/most likely not and the advantage likely still goes to Sony/Nikon. However, I am grateful for the improvements that I do see.
If I ever find the time, I'd like to pit the 7D2 against my 1DX at iso100.