Didn't know what's the trigger for her yet. Her husband has been a citizen for a long time. She never left Canada for 7 years except short trips to America. I think Sydney is giving RQ to some of the applicants randomly since the last May.
My friend's pretest RQ timeline:
Apply Sept. 2011
IP April 2012
Received RQ from Sydney in April 2012
Sent out RQ documents to Mississauga in May
Will take the test on Feb. 5th 2013
Hoping my pretest RQ processing is short like that.