They are probably short staffed which causes them to be real slow. That's understandable. What sucks is when they tell you to wait 4 minutes that turn into 15. Whatever.
What really, REALLY sucks, is when they short change you. I told the guy who brought our drive thru order to our car (after waiting), that the cashier didn't give me my change. He returned and said that "she said she gave everyone their change." I didn't even have a receipt and I felt bad for this guy who was walking to every car giving the orders, and definitely didn't feel like waiting more time there.
I'll take the full blame for this one; I shouldn't have driven away from the window without making sure I had my change. Hopefully, the register is up $5.02 and they can feel bad about it after (for like 5 secs) for not giving me my change. But - if the cashier pocketed it, I hope the $5.02 takes you far in life.
P.S. They didn't give me sauce for my tenders either!! Wait, maybe because they didn't give me the tenders I ordered (#5) they gave me the 3 piece! Now this is why you get one star...