A FlyerTalk Posting Legend
Join Date: Sep 2012
Location: SFO
Programs: AC SE MM, BA Gold, SQ Silver, Bonvoy Tit LTG, Hyatt Glob, HH Diamond
Posts: 44,375
On my last YVR-YYZ flight, the seat map was about 20% occupied at T-25. At T-4, it was 90% occupied.
Lots of people don't select seats in advance (due to Tango fares or other reasons).