So, the way the timing officially works is separate - so you add step 1 to step 2. The timing published online by CIC at http://www.cic.gc.ca/english/information/times/perm-fc.asp is for 80% of the cases so most cases are done faster than that but the tail of the distribution can be very long.
You can see the statistics at a more nuanced level at http://www.canadavisa.com/canada-immigration-discussion-board/case-processing-speed-at-visa-offices-step-2-t102206.0.html for 2011. Mexico City completed 20% of cases in 5 months, 30 % in 6 mo., 50 % in 7 mo., 70 % in 11 mo., & 80% in 13 mo..