There were CRS police patrolling the airport in Paris--I don't remember spotting any machine gun toting police (those I saw in the train and subway stations!).
My bag took about an hour to come out--both the YUL and YYZ flights arrived at about the same time, and were unloaded one after the other. I'd been told that each bag was screened upon unloading, but I don't know if that's a fact.
Tom