I'll just wait until my copy arrives, and test myself. But I'll try it in store and if my results matches those Bryan had, I'm not buying it... Plain and simple. There are endless discussions over the Sigma AF, and when people refuses to realize there is an issue it's no point. If there are great or horrible results, I'll be sure to post my findings and dilbert won't believe them.
Just tell me in advance, how do you propose to do determine the correct AFMA setting for the lens whilst you're in the store?