FYI there are some YYJ pricing in at $730s on 6/7 nights from at least late-feb into mid-march.
Also FYI YYZ is pricing in $850 for 16k+ mile routings ie. EWR,SFO/ORD for CPM of $.052. Not as good as the YYJ deal but not shabby for YYZ. Same fare restrictions, 6 night minimum.