Yes, makes sense....for shots like this, it's not noticable.  That's why I think a better test would be with shots showing long vertical lines especially at the image edges...ie architectural type shots.  I think any distortion would be most noticable then.

Re: dust bunnies....LOL!!!  If you have followed any of my threads....you will know I hate dust bunnies!...Double LOL!!!

In youth, we learn....with age, we understand.