I am a January 2017 applicant and our file is at Mexico City STILL without a DM. We are in queue for an interview, but our file took 7 plus weeks in transit. (File transfer was on March 6, 2017 and we didn't get the "We started processing your application" line in eCAS until May 4, 2017). They are all over the place at this VO. I saw some people only took 3 weeks to transfer the file. Some people think that they process applicants in batches (they open a bunch of apps all at once every so often), just through observation. If so, you might have just missed the last "batch".
As Starnaenae said, be patient, this VO is slow. It seems that most people got their PPR in about 10 - 12 months. Some of the lucky ones were done in 6 - 8 months. We are the unlucky and didn't even get put into the interview queue until 10 months into the process.
We also did not receive any correspondence from this VO since May 26, 2017. I was in touch with them, but only when I initiated communications, like asking them if we needed to send in RCMP fingerprints in July (which they forgot to request and I asked as I saw in my GCMS notes that they were requested but we didn't get any emails requesting them) and asking if we were in the interview queue which we found out through our MP's enquiry for status in November. BTW for us, they never posted any updates on eCAS nor GCKey accounts since AOR2 on May 26, 2017.