I don't know how it was when you were applying, but when I applied in 2018 the universities knew your HS and Waterloo was doing adjustments based on your high school.

Over the past 7 years other schools have done so as well. Waterloo's adjustment factor list got FOI'd and made public if you want to find yours.

Ok! The one I can find only goes back to 2016 and I was applying a bit before that. The grid has a lot of missing data since Waterloo probably doesn't have enough data for each cohort and HS to make a good estimate, I guess that would make a province-wide system like in Québec superior since they can adjust based on outcomes from all universities.

After seeing the list I'm kind of sad, I had the choice between two schools at 10 and 13, and chose the one with 13. A 3% difference can make or break an application in any competitive program... Well, at least it wasn't one of those schools with 20 point factor, wow.