Has Hashfast told us what stage they are in design/production? I find it very difficult to believe that they can go from 0 to full miner by October 20th - 30th.
The original design work on this chip started in 2011. The architecture work started then. The current version of the RTL code started in May 2013. The team have been working non stop 18 hour days, 7 days a week since then. We understand the importance of schedule. The chip design is almost complete. We're starting sales now because we're at the point where we the calendar of remaining items is fairly fixed, and we're confident we can deliver.
Simon