How wrong you are - sharpness is just a metaphor of death. Death of the subject in the guillotine of the shutter (Barthes). As I said most of the masterpieces are slightly OOF, but then your only argument is that the OP wants to make sure he gets something for his money.OP has a concern whether his lens is performing as well as good copy of this lens on same body should perform. That is not lust for sharpness, that is simply making sure that what you purchased is not a dud. Two hugely different things and "art" has nothing to do with later one.the lust for... are perhaps the most sure signs of photographic illiteracy.
Sharpness because it is only subjective - perhaps they mean resolution? Which is an entirely different matter...
Does it make it a worthy thread? - LOL! That's his private business, and most probably operator's error - with waste of bandwidth, yours, added in surfeit.
Am.
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Photostream: http://www.flickr.com/photos/amalric