I also sponsored parents. We have been waiting for about 5 months, and no response yet.
Hopefully we hear something soon!!
I have made a new post & tracking spreadsheet here for SRI LANKA PARENTS/GRANDPARENTS SPONSORSHIP:
Discussion thread...
Since there is no section for Sri Lankan Canadians waiting on parents/grandparents sponsorship, I have started this thread. Please share your timeline and update this spreadsheet with your status (you can update it yourself): It should be helpful to everyone during this long wait...