You have to love the number system too. We go there for lunch sometimes and our numbers are up on the "ready for pickup" screen in a few minutes. Full meal with drinks etc usually another 5mins later.
I reckon its a scam to make their store KPIs look better
Its never exactly what your order (eat in/eat out, size of chips, size of drink) which keeps the suspense up. Hate the ordering screens. Will be just an excuse to cut back on staff at the front desk IMHO.