After being flamed at on the ecointalk forums for asking this very question, I contacted MinerSource and they stated that they will not know what cords will come with your unit until it arrives at their facility.  They will then notify people on whether they need to buy cords or not.

Per ecointalk forums, David said they would do their best to ensure everyone has the correct cord, this was also stated previously in updates.  But, the first actual miner, received by MinerSource, did not come with a power cord per Thomas_s, and the first miner, not to a BA employee or reseller, came with the wrong cord (per ecointalk forums).  Obviously we know what BA's best is given our current situation, but I think given proper notice from MinerSource I can still order cables and have them arrive in time with my units so I cam holding out for that.  (although I would be very unhappy to have to lay down another 10 or so dollars per X-1 along with shipping costs)