I said start in 72 hours, which is still ~5 hours away.
~BCX~
Could he have changed the time because of the new checkpoints?
Or perhaps he is lying about his intended time frame?
Judging from his reply to TFM I got the impression that he would load up on XMR using TW then dump them on the exchange for BTC. In that case his plan failed (for now).
If BCX is really kickass, they will need to keep it frozen forever (or eventually accede to defeat and let BCX keep his coins which can't be identified) because everything will get so thoroughly mixed that it can't unwound. But I have no idea if that is feasible. Freezing the deposits and withdrawals doesn't stop the exchange transactions from accumulating on the mixed up chains.
BCX would need to have some really kickass technical guys working for him.