There's no guarantee that it will assist with your file. There are applicants whose parents are in canada on supervisa, and they have been able to do virtual landing and for others, it has not made a difference. Another thing to keep in mind is that if you are visiting over christmas, IRCC will be closed down so there won't be much going on.Thanks for sharing your experience. Yes we are US Citizens so we can come and go as visitors at any time (assuming the border crossing still allows immediate family). So if we wait until we are in Toronto to put in a change of address, any idea how long it might be before a final decision? And what if nothing has moved and we have to return after 4-5 weeks of staying in Toronto?
Once you return to the US, you will have to once again update your address to your US address.