No idea regarding the timelines!
They take the time that they do..
I've been waiting for 90 days, got AOR 14 days back. Waiting for SA.
Sponsorship approval happens in Canada for your spouse who is sponsoring you.
After that the file is transferred to your home country VO. (New Delhi)
Once they receive the file there, you will get another AOR with another UCI.
The official timelines for that as given on the CIC page is 15 months, but I've been checking the other forums, for India, avg time for the completion of the process is aprox 7-10months.
Good luck!