Any idea when?

I have no inside information, but based on building design I'd expect it to be a few years.

Unfortunately, Canadian customs is a long way from domestic. In order to do it quickly, they'd need to reserve the upstair walkway for OSS only, and remove the airline desks and transfer security station. That would be great for OSS, but would make all other transfer more difficult. AC would love it, everyone else would not.

What you're describing is not OSS.

Sigh. Okay. Same old, same old.

It seems that Air Canada changed its directions for flights from the States.

Link bus to Terminal 1????

Is this is connecting to an airline in T1?

It makes no sense to me either. If you can walk to the escalator down to D20, you sure don't need a bus at that point to catch a domestic flight.

Connecting back from the U.S. through YYZ to YOW right now. Landed thinking it would be quiet at noon on a Tuesday - nope, the U.S to Canada OSS customs connection area looks like the shopping mall on Christmas Eve. Looked like there was north of 100 people in line, through the glass it looked like two agents working and of course they still have no NEXUS for OSS.

I just went downstairs, went through Customs with NEXUS in 30 seconds, and went upstairs and took a peek at second floor security before going to NEXUS security on the third floor. Second floor security has no line, so I walk up and am through there in another two minutes and at the D gates; rest of the airport is pretty quiet as you'd expect at this time of day.

I'm not sure what landed just before me, but if Pearson / Air Canada want to make this a better experience for the masses who don't know better than to skip OSS when it looks like that then they need to ensure that transit OSS can actually accommodate the load.

Inside routes in Canada still, for the most part, suck. Take the outside route.
 

With one or two exceptions for international to Domestic connections at airports in Canada, it is almost always better to take the regular outside route than any inside route including OSS. Most inside routes do not have Nexus and/or priority security, and typically become a bottleneck either due to one security screening line and machine, or by limited customs/passport control points.

Well, when OSS started in YYZ this was certainly not the case, and I’ve never seen it quite so bad. I guess the signage is better for it now, and people know where they are supposed to go?

I know what to do in this situation obviously, I just feel bad for the VBITs (we call them FOTSGs now?) who wouldn’t know any better than to sit in that enormous lineup. And I’d prefer to skip the security clear if it didn’t involve such a long customs queue.

OSS @YUL
 

So far all 6 of my OSS @ YUL experience had been very good, from walking out from the flight (usually gate 80+ P @ YUL US area) to Domestic Gate (so far it has always been A2) with a stop at the Rapidair counter beside A1 to request a Standby for an earlier flight in about 15 min to 20 min -> all walking. I have 3 more to do, but again, so far so good.

Today, Sunday, it was a breeze from US (Transborder) gates to domestic departure. "Connection" is very clearly marked and there was also a person at the top of the stairs directing people Two agents, no line, I was through and walking to my connection in 2 minutes. Very nice and I paused to push the green smiley face button.

And which airport was this?

FYI YUL OSS is awesome.

Except for the stupid long walks when your flight from BOS arrives at the furthest possible gate, two days in a row, when you have 30 minutes to make your connection.

But I made it. Which tells you how much I like OSS.

At YUL.

Which is one of the "exceptions" I was alluding to upthread.

Yep, OSS at YUL couldn’t (realistically) be better. At YYZ, not so much.