Got mine a few weeks ago, 7,000 + frames on it. I haven't found any need to adjust lenses yet, I suppose I should set a proper test and at least check, but I haven't had the time or seen the need yet.
I compared some colour and resolution tests to my 5D. Colour was better as was the resolution(expected).
The overall handling, AF and VF is so far ahead of the 5D, that I suspect I will be selling the 5D shortly.
In good light, the files are fabulous, in dull light, you really don't get the potential out of the camera(true for 5D as well).
Noise levels on the 5D at 1600 are better though. All in all a really great camera, if a couple grand too costly.