I have done upfront medical on March 29, 2014. As well, CIC also send MR on April 6, 2014
My medical results were uploaded on April 5, 2014. After 3 months still my ECAS was not showing that Medical Results have been received
I sent an email to CIC about that including My UMI numbers and within a week span of time my ECAS updated to Medical Results have been received then passport request followed on next time.
However, they did not respond to my email. So looks like they read to our email, which we sent but they do not respond until it is absolutely necessary
Cheers