My little research is leading me to conclude that if the PA happens to come from some high risk countries, cic turns to delay PR even if everything is genuine. A typical example are countries from West Africa , India, Philippines, and other south and central America countries like Brazil, Mexico, Columbia and not to talk of Caribbean countries . However for all visa exempt countries an application for pr in most of the cases, about 99% goes smoothly without any thorough scrutiny . The conclusion is that if a PA is within those high risk countries, risk profile level increases therefore background checks and eligibility always delays. There is the need to petition. Cic don't go by their own rules in terms of first come first serve. The worst culprit is their various local offices charged with responsibility of finalising pr, they seem to be so autonomous and nonresponsive and do their own thing without proper and clear guidelines as to the timings within which application ought to be completed and even if there are challenges on the application, one expects some form of communication to address these challenges.For me it seems immigration is the least priority of Canadian government yet on their website they are marketing Canada as immigration friendly, trying to behave as if they welcome everyone on board. In fact cic systems are too beaurocratic, and it seems it is the culture of government and provincial institutions in Canada. Either they are under staff or immigration is less priority .So one would have to endure the hardships of waiting to the detriment of health and well being of applicants and their spouses . Certainly we must petition to the government to bring changes.This current system is not the best for Canada in this Morden world.