In the website it clearly says Three to four weeks.
Processing of Applications
Processing time for successful applications is currently on average three to four weeks. Please check this website for updates on processing times
Skilled sponsored migration - NSW Trade & Investment: Business in NSW
You will get some info in this thread.
Any recent ACS Positive Skill Assessment (as Systems Analyst/ Systems Administrator)?
State Sponsorship website links for reference.
State Sponsorship - Website Links Post