No,she didn't have a reason for that. Just said that Sydney is loaded with many applications from different streams and performance of each VO varies.
Also in response to how can we reach them,she sent a mail with some details of Sydney VO with subject "Request to information". It just has the link to web form and actual mailing addresses instead of an email.
To my surprise,they don't just have one single office in Sydney but have around 6-7 different offices for different streams.
Worst part is I couldn't find one for EE- FSW applicants