I've created a Google Sheet to track relevant awards information, if anyone wants to add their information. (All identifying information is optional, obviously)
LINK: https://docs.google.com/spreadsheets/d/1t69LNyYhZv9jj6I8dPrt7m-9VZVluqRPyMtGwraNOF8/edit?usp=sharing
From the answers I've gotten from SSHRC in the past, it seems that waitlist placement is dependant on committee (as are the scores that it takes to be awarded either a CGS-D or a SSHRC Doctoral Award).
DISCLAIMER: I have not received my letter this year, so I don't actually know where I stand right now, other than that my application was forwarded to Ottawa in January.