I wonder how many people believe that ONLY the centre point can be used for AF? Well here is a picture from last night, in poor light, with the 5D2 using all points AF. According to the pundits the AF system on the 5D2 is so bad that this is not possible - so here is yet more proof that the AF system isn't that bad - exif is intact is you want to see it.
I've found in low key studio setup with just low power modeling lamps and a totally dark room the other points will not even lock on with an f4 lens period. same lens on the 1D no problem any point lock on strait away
but in this situation its not a problem to focus and recompose using the center point.
now that i've gotten over the shock of going from a 1D AF system to the 5D AF and got ways around the problems i encountered it doesnt bother me. I'm mostly looking forward to having an AF i dont have to worry about. It does'nt have to be the all singing all dancing 1Dx system. I just want it to work with having to mess around with it.
And i find AI servo back focuses so i just stopped trying to use that on the 5D at all
Also I have found the 5D mk2 AF system works extremely well with my 600f4.5 FD lens...