I believe the person who takes your order also has to package it up for you, then also runs the payment. So yeah it does take a while. If you are in a hurry (lunch break), inside is much faster.
They have ONE person who works drive thru, and they prepare your order as it is ordered. If you want faster service go inside where thier are 3 people working the line. One window, one employee, and food served fresh not nuked or under heat lamps.
Thanks! Your answer is awaiting moderation.