I'm an october 2013 applicant that also still waiting for PPR remember -_-;
and yes, my ecas status also doesnt say anything about medical received.
The latest status that I got on ecas was "we started processing your application on apr 28, 2014".
Patient my friend, every person has a unique processing time / case, and you'll go crazy if you keep comparing with other applicants.
That being said, I think you already did the right thing (visiting MP/ordering GCMS/etc). let's just cross our finger and pray that this waiting(painful) process will be over soon. lol