Given that staffing will not have changed by then, I would assume that you expect the same issues, depending on time of day. But it appears that you will have more luck if you have a Nexus card. Otherwise, get there early.
Not that we really know how accurate it is, but you can always check the
CATSA site on the day. I'll be doing that when I wake up on the 12th, since I'm flying that morning.