The savvy consumer has come to realize in this day and age of outsourcing production that there are always hick-ups on the production end, especially when that production is being done in China. Various factors such as Chinese New Years, incompetence, shipping delays, customs, and the like are a constant concern. Two differences between that, and what is going on here. 1) The communication works best when the publisher is very upfront about what is going on, with a high level of detail. Police Precinct 2nd edition right now is at several months behind schedule, but the company maintains a constant thread on BGG explaining what is going on and what the new dates are expected to be. They get a lot of slack because everyone knows exactly what the issues are. 2) The delays are better received when they are, as in your example, problems on the manufacturer's end. If a publisher sends books off to get made and then the company printing the books takes a month off for Chinese New Years, there's not much that can be done about it by the publisher. If on the other hand, the delay is on the writing, art and layout end, then there tends to be more grumbling.
Its not a WotC thing, its a dichotomy between in-house and out-of-house delays, and how honest the fans perceive the reasons for the delay to be.