Just a warning to you ex-YYZ int'l travellers - the priority security shenanigans on the water tank side now integrates with the pleb line about 75% of the way, which means you are forced to line up with the plebs down a long corridor before reaching the actual security scanners.

Your best bet is to use the Nexus line for now until all that gets sorted out in a few weeks. I went to the J/status security line and while I was standing in line with the plebs, I talked to a CATSA agent who happened to walk by on the otehr side of the stanchions and confirmed that I should've used the NEXUS line despite my status and J cabin so she let me through once I showed her my NEXUS card.