in Europe receptacles and switches with screw terminals have died out years ago and have been replaced by qack-stab only ones. Quality products normally don't cause problems, cheaply made ones do. On the other hand I recently bought some of about the last receptacles made with screw terminals (back wired ones with compression plate terminals) and they went straight from the box to the dumpster! The plastic was so soft the compression plate would twist upon tightening the screw and never make a solid connection. Even though i dpon't really like backstabs I don't have any _logic_ arguments against their use. It seems like most backstabs sold in the USA in the past _were_ made quite poorly and thus have caused many problems and a strong dislike amongst the electricians. here in Europe most electricians _love_ them. The only reason i ever heard from a sparky for liking screw terminal recepts was: "well, you can put in 4 wires if you try hard and in the backstabs you can only get 2!"... not exactly a qualified reason for using screws!
At home we have backstabbed receptacles from 1991 that are being used daily and so far none of them failed. The only thing I _really_ dislike about the old backstabs is the flimsy release button that's almost impossible to press.
