Doesn't ATi allow for cross-shipping a replacement? Meaning you RMA your card, and when you mail it back, ATi will mail you a new card and put a hold on your CC for the new card, and when ATi receives your RMA'ed card they remove the hold from your CC. Thus you get a new card much sooner than if you wait for them to receive yours + check it out first.
Maybe they only do so in clear-cut cases.