dirkenmarjolein said:
How did you found out it is 90 days?
According to the CIC Vienna website, it currently is 30 (working) days:
http://www.canadainternational.gc.ca/austria-autriche/visas/processing-traitement.aspx?lang=eng
However, according to the experience of some forum members, it might take a lot longer - check this thread:
http://www.canadavisa.com/canada-immigration-discussion-board/applicants-vo-vienna-please-join-t79097.0.html