I just picked mine up and was surprised to see that it was approved on April 16. Took longer than usual for the stamp to make it back.
Dang, did the dealer forget to notify you or did it legitimately take over 5 weeks? All mine have taken ~10 days, give or take a day, but I did have a form 3 that sat at the dealer for over a month until I called and asked about it. That's what I get for trying not to be the guy that calls every week to see if it came.