Puzzled by your data
I can't help but wonder...
I shopped around quite a bit before I bought that lens a couple of years ago, and have been totallly satisfied with it so far. As far as I could tell at the time, it was considered an excellent choice, at least before the 16-35 mm lens was available. The information I found at the time was not as technical as what I can find here, but since I'm not a pro nor a technical data specialist, I felt comfortable enough to shell out the 1700-ish $.
If the 17-35 mm gets such dismal results with your panel of tests, how could I use any of your data to help me choose new lenses?! I know numbers are not the only means to describe a lens, but still, showing this lens at the poor end of your spectrum is quite disturbing. I won't stop using it, of course, but I will probably more rely on personal opinions than DXO Mark's results to help me choose new lenses.