I don't think the data from CEAC update in real time though, or at least at the end of the day every day. That's why we sometimes see a fairly high amount of cases being updated and it seems super high vs any other day.
@bibinpanicker did they ask you for your documents at all? I also sent on March 28 so just curious. I am EU though. We are pretty much in the same range, CN wise. (In term of number of cases before and after us)
Oh and just FYI, latest update from Montreal (as of today):
Nothing new here. We may have to wait until next month. We'll see. I haven't checked how it's going for the EB visas yet.