Dnkldorf:

I've seen the back-stab only receptacles you speak of.

Leviton makes them and they're for sale at one of the local Home Depot stores (in Manhattan).

They're also the standard in Korean domestic wiring.

All residential sockets (either for American plugs or European plugs) and switches manufactured in South Korea are back-stabbed.

The ground terminal is the only thing that uses a screw with a pressure-plate (a nut behind the metal bracket that holds the screw)

Korean devices are designed to American dimensions and fit American boxes.

I brought a dumpload of new ones back when I returned from my trip. My friend who lives there LOATHES them with a seething PASSION.

She'd take a screw-terminal receptacle over these any day (which means I get to buy some of her electrical material and ship it over [Linked Image] )