Shouldn't take too long to gather up your interview paperwork. It only took me a couple of weeks, other than my long form birth certificate. For that I had to call my MPPs office and have them light a fire under the registrar's butt to get it done. Ontario government is slow at everything

Where in Canada do you live? If your interview will be scheduled in Montreal, you've got quite a wait anyway. That consulate is always backed up, and slow in scheduling interviews. Vancouver is a bit faster.