Thanks "The Dream2015" Waiting with baited breath for the return tracker to get activated. I also sent it to the same address on October 27th and it showed as delivered on the 30th. So six days since and counting.
The signature on Canada post tracker is hardly readable so very anxious to find out if CIC actually got my passports. My spouse called them up and they said if the tracker shows as delivered it must have been and that they have no way to check if its with the file. The agent also told me that there is no timeline for the passports to be returned.