I really don't understand what Target's idea is with the street date. It's written nowhere on the box that they're to be held in back until that date. It's their own date I suppose... maybe when they redo the action figure section.
Still, I think it has a lot to do with meeting the right redshirt. Sometimes you'll find one that'll help you and others that won't or flat out lie. I figure they'd want to sell goods now, not later when these are being put on pegs slowly at other Targets, TRUs, and now WMs.