Just don’t freak out if your scores take longer. See http://www.act.org/content/act/en/products-and-services/the-act/your-scores/view-your-scores.html – which gives a range of dates and states that scores “should be up within 2 weeks” but also says that scores will “start going up” on April 19. I saw someplace else on the site that scores will go up in batches (couldn’t find the link again) over a period of days, so it may be a matter of luck.