Hope this is helpful for someone as we were nearly caught out with DD 18 months ago and we will be caught out with DC2.
As I'm sure most expats know it used to be that you applied for new or renewed passports through your local embassy or consulate and they did your new one which usually meant getting it back very quickly. At some point in 2010 you then had to apply to a regional centre who would do the knew one. I think there are about 7 regional centres so for the far east everyone had to apply to HK.
Now you apply to your regional centre but your passport is sent from the UK. Which means much longer processing times. Be aware if applying for new passports now!
New passports for DC are 6 weeks minimum. They said the same thing when we applied for DDs passport in HK but it still came back within a week. We've been told by HK that this sort of speed will not happen any more and to expect the sort of delays that you usually see when applying from the UK.
Hope that's helpful to someone!