FYI, I'm now able to log onto the online services. Nothing much is noted there yet, just that my application was indeed received on Feb 4.
Given that I did my medical exam a while ago, I'll give it a few more days till I see the "Medical Results Received" on ECAS. I've read on other threads that some people have given a call to their medical office to confirm they have in fact filed the results with CIC so I'm thinking to do that in a few days.
EDIT: when I use my sponsor's UCI to access ECAS, it shows that 1) our application was received Feb 4, 2) they started looking into his application on Feb 27, and 3) the decision was made and notified on the Feb 28, which corresponds with the SA email we received. When I use the Applicants file # that was included in the SA email notice to log onto ECAS, it says 1) my application was received Feb 4 (presumably at CPC-M). Hope this helps!