Same here, made the payment friday am, got the miner tuesday pm. Everything running fine, nice build and everything. Definitely not a scam. In-stock ASICs with quick delivery should be the norm, thanks to bitmain for raising the bar.
"raising the bar" would have a product in a fully functional website with cart/checkout system.. is this ready yet? The original post even points towards this:
"All 1st batch miners will be able to purchase our product at our official online shop once the S1 is in stock and prepared for immediately shipping out. Remember, we sell miners in stock in the first round sale! There will be quantity discounts, and we only need about one week to produce the first batch."