It doesn't appear to be a "north of the border" thing as I just called my Tesla shop (Kitchener, Ontario) to inquire about the delivery schedule. Not the most talkative Tesla employee, but he did say that shipments have been coming in of various sizes with regularity, and in my particular case he appeared rather confident that it would be "mid-June" when I receive my Model 3 (white, SR+). My actual Tesla account says June 9 - 28, and I ordered April 16th (not 17th as I stated incorrectly in a previous post). When I expressed concern that I might not receive the car until Q3, he reiterated that I'd be looking at "mid-June".
In the meantime, accessories have been arriving at my house in record time, I'm continuing to watch YouTube videos of the Model 3 (esp. those of Carter Jones, R. Shaw, etc...), and I've just begun re-reading the manual, yeah that's right, "RE"-reading! And, I bet I'm not the only one! Admit it!