Somebody needs to order a batch of these printed from China and try it out!
I can't talk for the US, but in Europe where I live there are some amazingly cheap options for prototype batches. You could probably order a prototype batch (2~3 boards) for around 150 euro with a 7 day delivery. Ordering from China from EU will probably take around a month to arrive.
It may be useful for smaller pcb's and a fast turnaround, but given everything at the moment, is anyone really in a rush?