I think you mentioned in an earlier post that your IP1 was still in progress?
If that is the case then your file will be at CIO Sydney only, as files are transferred after Ip1 is done. For some applicants though, file is never transferred (till IP2 starts) from CIO and most of checks are done there.
After 3-5 days from NA2, it is safe to e-mail for knowing VO as mostly by then files get transferred, if they have to. I think the 2 people are waiting for a reply today, that will shed more light on this.
I think
@astralsource did 2-5 days after her IP2 and got reply, I will ask
@comfortablynumb here, can you please tell when did you find out your VO?