Not sure about 2016 PGP, but quite sure we were told the whole processing time would be within a year for 2017. (Not sure where I read that). So previous years applications shouldnt really affect 2017 PGP
here is the official statement on the timeline released a few days ago.
https://www.canada.ca/en/immigratio...pouses_being_reunitedmorequicklyincanada.html