My new D800 has Left/Right AF issues too :(

I've seen amateur telescopes take as long as five seconds to settle. One could test settling time by simply attaching a laser pointer to the camera and watching the do jump around. Aim the laser pointer at a piece of grid paper 20-30 ft. away. Trigger the camera with a wireless remote, or watch the grid paper with binoculars.

--
Robin Casady
http://www.robincasady.com/Photo/index.html
"The whole problem with the world is that fools and fanatics are always so certain of themselves, and wiser people so full of doubts."
— Bertrand Russell