my parents just landed,share with you the status.

2009.10 submit application
2012.03.30 request additional materials
2012.04 late month, courierred materials back
2012.05 sponsorship approved
2012.07 mid month request for medical exam,police certificates
2012.07 late in the month,used visotor med exam for immigration exam,CIC website showed medical results received
2012.10.17 request for passports etc.
2012.10.23 couriered passports to Seattle
2012. 11.27 received passports with Visas
2012.12.18 parents landed at Vancouver airport