Finally Its Done!!!
Parents received their Visa stamped passports from New Delhi office.
It took 7 business days to get back the PP's(sent July 25th and received back with visa August 4th).
Visa is valid until their medicals are valid(1 year from the date of medicals). May 25th, 2016.
Here is the time line:-
Sponsored- August-2010(both parents only, no dependents)
Documents request- August- 2014
Document sent- October 20th, 2014
AOR received- January 20th, 2015(dated Dec 30,2014)
additional document request- Mar 25th, 2015(via email)- Doc sent Mar 27th, 2015(via email)
Sponsor approval- April 2, 2015 (file sent to Ottawa)
Medical request(via email)- May 18th, Medical done May 22nd.
PP request(via email)-July 24, 2015. sent July 25th via VFS India to New Delhi
Visa issued-Received passport back August 4th.
Landed- soon...
I wish all of you best of luck with your applications and Thanks a lot for all the valuable information, it really helped.