The only thing I will add is that the additional information (2nd post) is not necessarily correct. They claim only PA from high approval rate countries are put into the Low risk stream. My PA is from Philippines and we were processed completely in Mississauga and total processing time was only 4 months. It was never transferred to the local VO. I am doubting Philippines made it onto that prestige list of countries
Although it does state their triage criteria is subject to change so maybe that list has relaxed since then.
I would speculate triage criteria may contain other things such as time spent living together, age gap, etc. My case was a very simple situation (I lived with my wife in her country for years and still lived with her at the time of the application, we are both young and close in age, etc).