There were a few people in existence who weren't complete idiots. They were few and far between, in Ianto's experience, but they did exist. Several of them in Aternaville, too.
Ianto led the way swiftly out of the frozen foods, towards some other display. It was probably brightly colored. "Oh, I don't know. It's just new. Nothing more. I think with a bit of practice, you'll have it down better than most people who lived with this stuff all their lives." Ianto blinked a little at Elphaba and then smiled, a touch on the amused side. "Besides, freezers are simple things. It's just a cold box. Computers, though, are a bit ... complicated. But not freezers."