Comment by os2warpman

I was a trained cashier many years ago because I didn't grow up privileged so I had to work retail (and dishwasher and waiter) jobs.

Not only do I have the muscle memory, still after 30 years, I also have the added incentive of knowing the value of my own time, not being fatigued from hours of work, the ability pre-position items in the cart at an optimal orientation for handling and scanning, and foreknowledge of what items I have and a plan for how best to bag them that was made prior to my arrival at self-checkout.

So, yeah, I scan faster.

Much faster.

edit: oh man this has brought up a bunch of frustrations. Why do customers just pile shit on the counter? When I interact with a cashier, like at a gas station on a long road trip, every item I place on the counter has the barcodes oriented towards the person, so they can just "zap zap zap zap" the items rapid-fire without handling them. My bag (I live in a civilized state that has banned plastic bags) is ready and waiting, items are organized and presented in an order that make sense for ease of bagging. My payment method is ready. The experience is efficient and quick.

It takes no mental effort to do any of this and yet I am constantly stuck behind people who act as though they are purchasing things for the first time in their entire lives and the process is as foreign to them as communicating in the language of an extraterrestrial intelligence is to me.