Hello and welcome !
you should joint the Mexico thread here for lots of information on the process in Mexico.
http://www.canadavisa.com/canada-immigration-discussion-board/mexico-t35385.1155.htmlEveryone's case is different so it is hard to say how much longer it will take you.
You can see here
http://www.cic.gc.ca/english/information/times/perm/fc-spouses.asp that 80 percent of all cases between October 1, 2010, and September 30, 2011 that were sent through Mexico City were processed within 14 months from the time they were received at the embassy (not CPC-M) . Processing times are subject to change.