Well, have you even considered, that with the problems at hand, they handpicked a few customers who should receive their devices asap, because iRex sees a lot of sales potential there? That would make sense to me and explain the unchronological order of shipments. But then again, it might not be in their hands at all.
P.S.: Anyone received a tracking number yet? If not, dont think anything is shpped yet. Just my personal pessimism speaking.
