I’ve had pleasant and not so pleasant experiences at Pearson. Weirdly, the pleasant ones are the more recent ones. Speedy passage through security, bags picked up in record time. Once I think I was out with checked bags within 30 mins from getting off the plane. The key was using the app that the tinfoil brigade kept clucking about. Made everything super efficient. I also pay the small premium for the bump up in economy that gets priority baggage/boarding etc if that’s available for my flight.
Having said that…I’d fly from Trudeau every time if it was a better price!