Montreal is usually only slow with FD to P1, P2 and even the ECOPR, i.e. up to 3 months in most cases. But from what I have seen in forums and FB their PR card processing seems faster compared to other VOs, usually 2 to 4 weeks.
My guess is if your ECOPR was received in Dec, with the Christmas shutdown you should get you PR card processed in Jan and reach you latest by mid of Feb.
It is the other way around with Etobicoke where the P1/P2/eCOPR is faster (2-5 weeks) but the PR card takes usually 3 months or so.