I think in Britain, the cashiers in McDonalds are noticeably better than most fast food places and I have more trouble with the kisosk. The Touchscreens are variable and for some reason, they don't detect when the receipt paper has run out so you are left hoping the order went through and not lost in the ether. I have waited a long time for food since the kiosks and have to go and ask if the order is on the system.

Since people pick it, I have still had order mistakes but hey, it usually means ordering quickly instead of waiting behind the person who wants to reconfigure the entire menu during their order.