I wonder how many people are gonna want their 5DIIs back?
If image quality is an issue as what has been mentioned assuming it is valid and not a misalignment/user error, then maybe quite a few... If they turn out to be like the recent production samples we have been seeing the last few days, probably not a one.
When I first got my 5D MK II, there was a 1 week learning curve on how to use it. Its not a point and shoot camera. When I bought a 7D a year later, it was even more difficult to learn, and pretty frustrating.
I do expect to spend some time taking several hundred images and trying the settings to better understand which ones work for me.
I will start by using center poiint only, which will reduce operator error and tell me if I need AFMA or not. Once I've mastered that and get sharp images, then I'll move on to tracking and the more complex features.
The resolution of the body is fixed by the 22 mp sensor, so sharpness is going to be determined by the lens and the operator.