Hey all, I don't usually (ever) post here because I'm applying through POS but I often read your posts because I find the info helpful and relevant to my case sometimes. In regards to this, I think it depends on when you sent your application. In the past when you did medicals outland (outside of Canada), they used to be sent to the visa office for your country (ie Jamaica, etc). However, when my partner got his done, it was sent to Ontario where they do stage 1. Knowing this was strange, I asked about it and the doctor said that all new medicals are being sent to Ontario instead of the actual VO now. So, if you applied AFTER this change occurred (we did medical about May 2011, so around that date) then your medicals probably went to stage 1 office only (ie medicals received would NOT mean that your home VO has your file). If you applied a lot earlier, it may mean they have your file already (as I think medicals used to be sent to your home country's office). Does that make sense?
I know for my case, my medicals received info was put in in Stage 1 (Mississauga). HOpe that helps!