Could be... S2 is now gone from the website. Maybe they are re-engineering the S2, rumor had it that some people got S2's that hashed at 2Th, so I wonder if the S4 will be 2 Th/s.  That would be a start, but they need something to compete with Spondoolies which I think is starting to eat into their marketshare. As soon as the S3 sold out in Batch 3, the SP30 (6Th/s) September batch sold out.