iamzip
Ambitious, but rubbish
Really it's both. Granted I don't have high end dSLR gear, but neither my bodies nor my lenses are geared towards manual focus. I do have the Voightlander 40mm Ultron for Canon, which is manual focus, but I still have a hard time focusing with the crummy focusing screen I have.
Its not really the lenses that make manual focus difficult its the focusing screens which make everything appear in focus, I changed the screen on my 5d for that very reason. Also if you have the camera setup up for back button focusing you can tweak the focus at anytime helpful if you are shooting through glass or a fence etc.