It typically takes 1 to 3 weeks, however between July and October this year, virtually no passport requests were made. The best murmur as to why, is that they stop requesting during that period to focus on processing student visas. Fortunately in the past 4-5 days they have started up again and seem to be catching up nicely.
Trackitt is an excellent website for estimating how long the various stages of the application process is going to take for you.
trackitt.com/canada-immigration-trackers/canadian-experience-class