Data point: my son had a ~1:20 connection in YYZ late evening Nov 10, intl to domestic, so customs, security, etc. We knew it would be tight. Inbound was 17 minutes late, so he was resigned to a misconnect. He had to negotiate with someone to be allowed to sprint to the gate to at least try. The connection was 17 minutes late and he made it, barely. Bags didn’t. We don’t know if the flight was held or if it was delayed for some other reason and he got lucky. Maybe someone with EF could check: it was WS 725.