So I gave YYZ another shot (I almost always prefer to fly directly into YYC and clear there) and found to my dismay Nexus cannot be used to connect and you have to fill out the stupid customs forms and wait. Told if I want to use Nexus I have to go out and lose OSS.
Sooooo I either get Nexus to bypass customs and get OSS or I use Nexus and then have to go back thru security. Seems backwards to me.... is YVR the same?