What did the third line on ecas say?
Actually, here is what was listed in PR side of eCAS:
1. We received your application for permanent residence on Jan 25, 2017.
2. We started processing your application on May 4, 2017.
3. Medical results have been received.
4. We sent you correspondence on March 2, 2017. If you have not provided the information or the requested documents, ......
It was line 2 that was new. Before last Friday (May 5), we only had 3 lines (#1, 3 and 4). I think this is our unofficial AOR2. Strangely, nothing changed in our GCKey account. It had been saying We are processing your background check since SA or file transfer. However, as I said before, I'm sure it wasn't happening yet. On March 23, they sent an email telling us they received our Schedule A which we emailed to them on March 14 as per their instructions, but they told us in the same email that they had not received our file yet as it was still in transit. On April 19, I had sent an email to the VO to ask them what our status was as we had been waiting close to 6 weeks to receive confirmation that our file would be opened. We received an email from the VO on May 2 saying that they still had not received our file and that it was still in transit. (Our file was probably sitting on someone's desk in queue).
Finally when I checked 3 days later, that is when I saw the second line added in eCAS on PR side. Maybe my email gave them a nudge to do something. I don't know which VO you are going through, but hopefully it won't be as slow as the Mexico City one. Some people on the Mexico thread have said that they think files are opened and processed in batches every 2- 3 months. I must have just missed the last batch, as several people got AOR2 confirmation (request for documents or change in eCAS usually) on March 28.
I would go and read up on what happens with your VO, as each VO does things differently. I have not heard of other VO's processing in batches, so hopefully when they receive your file at the VO, they will open it right away. But check your eCAS and GCKey account in case they don't send out AOR2 emails. Any change likely will indicate that there is movement with your file again.