SFT I respect most of your posts even though we seldom agree, but here you've gone off the deep end. There was no 250 diff, that was testnet data on a pool web site.  The correct diff chart is here: http://monerochain.info/charts/difficulty

A week ago, when Monero not on an exchange (in fact not even any rumors of being on a major exchange soon -- poloniex was a surprise to all of us), the diff was 17 million, which is almost 3x the current BCN hash rate.