Originally Posted by
gglave
Can't speak to your exact experience, but I've used the Trusted Traveller line at YVR transborder CATSA security dozens of times and in those cases it definitely doesn't go to 'the same place.'
You go to the same hall, but unlike everyone else you go to a queue where you can keep your shoes on, liquids in your bag etc. There is a large sign to that effect.
Depends on time of day. Sometimes it truly is just them letting you cut the line to the "normal" security lanes.