I have a second batch order.... Your opinion... Have I to request a refund ? 
Taped Out in March: https://www.kncminer.com/news/news-78
TSMC 20nm cycle time (masks creation) is 4-5 months. Samples in July / August. Miners probably in August / September
I'm worried about this... any other opinions ?
From tapeout to mass production can be done within seven weeks if everything goes OK. While tapeout was in February so 20nm starting to ship late April is a very real possibility. They're just trolling hard for their own hardware sales.