“Up to 90” is great, but their own site says full speed will regularly be 100 on the SdC and in the West Island. The segments From Panama to Brossard aren’t ideal for top speed testing.
I’m not saying they should hurry up their testing protocol, I’m just pointing out that there are many tests yet to be done — including stops at stations and timing the screen doors, along with full tests of trains with nobody aboard — and the segment from Central Station to Brossard remains largely incomplete. Pretty difficult to test the system when it’s unavailable.
So one of two scenarios will evolve: testing will be rushed (and perhaps with deleterious effects) to open by the end of the now-promised “spring-summer 2022” timeframe, or the timeframe will be pushed out further.