It sounds like waitlists continue to move into June, and then to a lesser extent during July and August. It might also depend on the schools -- it sounds like some schools immediately offered spots as they became available, and other schools haven't had movement yet (I'm hoping this is because they are still sorting things out, and not because they have no spots open!)
I, too, am hoping against hope that these waitlists continue to move. But it certainly isn't over yet, from what I've heard.