Never doubt the power of teenager girls. They buy physical copies first week. See 1D and that other group Day Of Summer or something like that.
It's an EP, physical copies will be rare.
5SOS is strong; but 80%+ stemmed from digital and they had tons of pre-orders. Austin's singles always drop after less than 1 day (5SOS's recent single went #1 on iTunes, something he's never done) and they were doing a lot better by now. So idk.