Yes, we have been mining with one S3 testing sample on our engineer's desk. But we have not been able to do a large mining farm with S3 yet. We have been using S2 machine to deploy a mining farm, and that is how we own the hash rate.
Hope that these words are genuine
I was actually hoping they were mining with s3s so that when they do ship the network hash rate doesnt go through the roof instead of just being reallocated this will equal less roi
Personally, If these companies insist on testing (or mining) for a prolonged period (not suggesting that is the case here btw) then they should take the customers details to mine on a pool of our choosing. quality testing? check. better propect of ROI? Check.
Yeah, i wouldnt care if they mined with my S3 as long as they used my pool user and pass and of course discount a % for electricity cost, but at least i would receive something on the waiting period since i payed

(if they were mining with S3 of course), if they are not, just with 1 for testing its ok, but i suppose they must test every unit at least a few hours to see everything is ok.
Sorry bitmain its just that this is my 1st order in your website and dont know how this works

have 2 S1 but bought them on ebay

I will just relax and wait for my 2 S3
