The usual stuff in Toronto but they didn't ask for anything. If at all anything, i had quit and left USA before my H1B expiry and they confirmed if that was the time i had moved to Canada and i think that worked in my favor.Thanks for posting your experience. What documents did you carry for the visa interview and if I may ask the Consulate you atteneded?
Overall, it was friendly. If you are scheduling one, just take it easy and be upfront.
Besides, if one is applying for B1/B2 near the 3 year term in Canada, it shouldn't be a big deal. It would just be a matter of time for one to apply for Canadian citizenship and then on no need of any visas.