I'm encouraged by the results I see.
I know there will be few duds out there, but I hope that puts a little confidence in the focusing ability of the 5D3. I know when I went from a Rebel XT to my 7D, I was blown away by the focus system on it. After trial and error and some soft images, I then realized some focus modes work better for certain situations.
All I'm trying to say is, that there was a learning curve for me and the soft images I had produced were a reflection of me not understanding the system at the time.
Give it some time, learn the system and I'm sure this camera will not disappoint.