Based on the experiences of several others, it seems as though for Chinese married to Chinese, it takes a bit longer to process the visa. If their are children involved, the interview is usually waived, but a DNA test may be requested.
For westerners married to Chinese, as long as everything is straightforward (first marriage, etc...), the processing time seems a lot shorter. If there are children involved, no interview and highly unlikely to be requested to do a DNA test.
Perhaps this is why it takes longer for some, but much shorter for others? I can't blame the VO, as I know there have been a lot of fraudulent cases from this part of the world, and some even use children that are not their own to try and speed the process up.
I hope everyone gets through quickly, but not the fraudsters trying to abuse our generous immigration system. I know of an agency in Guangzhou that said they can 'guarantee' a successful application, which of course is total rubbish...and they were charging over USD$6,000 for their 'services'. These are the folks that ought to be shut down, as they help a lot of people who are in fake marriages.
FS