I'm assuming people order at a counter, and get their food either by the time they get to the end of the line and pay, or have their number called, something like that, right?
And in places like that, they're mainly interested in people who can go fast. Former basketball coach John Wooden used to have a saying, go fast, don't hurry (not sure of the exact quote but something very close to that, and something contradictory almost in a zen-like fashion). Well, what I think he took from this, go at a nice fast clip, but don't go so fast that you make more than a few mistakes.
And for me, that kind of approach can sometimes be a refreshing break from my usual perfectionist approach. For starters, it gives me permission not to double check.