As I recall, they make all their calls first, and update/send e-mails later. If you're international, you may get an acceptance e-mail instead of a call, (this
may have happened to some US/Canada-based folks in R1 as well - not sure). So, don't worry about constantly refreshing the application site - won't do you any good until you get the e-mail. Just try and treat yourself to a nice lunch, and write 15-20 pages of your novel while you're waiting. No biggie.