This is my second copy of this lens. First one, the AF jerked and hunted before locking focus.
When this copy nails the focus, it was at least as sharp or better than what you posted. Trouble is, it often misses focus, especially with the 7D. I tried my daughter's T2i and not much difference. The lens seems to work better on my 5D II but when you focus on anything far away, it back focuses. None of my other lenses have this issue.
I already boxed it back up. I'm just waiting on the shipping label.