So, according to DHL's website, with the tracking number I found yesterday, the shipment arrived in Montreal this afternoon at 12:36pm and signed by "IRENA". Whether or not my case was actually in that shipment, I'm not 100% sure, but I have a good feeling it was. I'm going to call up DOS tomorrow and see if an operator can confirm that my case has indeed been received by the US Consulate in Montreal.
P.S. Wow, two posts in one day!