That's just how dirtypcbs roll, it's dirty by name, dirty by nature, no frills, no hand holding, no patting you on the head and saying "there-there it'll be allright". You want fancy service with bells and whistles there are plenty of others.
Also, the message is entirely factual. China is closed for the next couple of weeks. It closes every year. This is not a new thing.
PS: From what Ian has said recently, at best dirtypcbs breaks even, and between the lines, I think he may be optimistic in that. I don't know how dangerousprototypes actually makes enough money to operate on a daily basis, it's not from dirtypcbs.