You have a good mechanical advantage at the wheel over the shaft components. Off the top of my head, a way to check for play would be to lock the shaft at the box, perhaps with some Vice-grips (not often I think of a good use for those

) and see if the steering wheel moves at all.
In any case, I'd love to see the results of a similar poll, with the standard for measuring spelled out. Too much ambiguity for me to trust the 8 responses of less than 1 inch of play. When I was looking into this for a friend, it took me some trial and error to come up with a reliable and repeatable way to measure the slop, and if asked before I had done this I would have said my wife's truck had no slop. I don't believe it's possible for any car to have zero play at the steering wheel, but I might be wrong.
-Spike