Wicked, you musta thought i was a chump with my around the house testing of the focus lol. You really get into this! Do you do landscapes too?
I shoot weddings and sports so pretty demanding on the focus system. From what i am getting things are looking great and better than the 1dm3 even. I don't have work to back up my findings nor have i decided on a field trip to do so. Although i love all the info i can get my hands on, this type of technical doesn't inspire me. That's just me though.
As far as the white balance goes i do believe the 5d and 5dm2 both have warmer tones. I believe the 5dm3 to have more neutral tones which i prefer since if i want to add WB warmth i will but i dont want to have to take WB warmth away.
I wonder if you got a bad copy if you aren't finding things to be great, it sounds like you did some micro adjusting and yet still not happy? One thing about electronics, they can have bad parts and typically problems show up right away like for JR. I remember going to Norman Camera and we took out a new camera and turned it on and an error flashed the screen and it was un-usable, i'd feel bad for the person that waited to get home before testing it.
I shoot mainly weddings and studio, some landscape stuff and street for fun and occassionally wildlife
I'm thinking its less that I have a faulty unit and more just getting to grips with the new AF
when i got 5Dmk2s i had to completely change my shooting style and reconfigure my 1D3
so that they operated in a similar way so have been using center point only focus and recompose
my main use of AI servo is for the faster parts of weddings and walking models so nothing as fast paced as sports but i'm still playing with the settings.
One question i have been wondering about the AF modes are they like pictures styles where each is just a variation of the customisable sections that have sliders or are each seperate functioning items and the sliders are for tweaking each one. the manul isnt clear about this.
as for image quality I definately think the 5Dmk2 has the edge in low iso but the 5d3 is holding its own and definately pulls ahead the higher the iso climbs.