Besides the fact they cost more than standard receptacles, everything you've said is false, Matt. They do indeed offer improved retention of the mated plug and building conductors and lower electrical resistance. They are not designed to quench arcs (sparks).
When compared with the specifications of a standard house-hold receptacle, they have improved flammability, insulation, fault current withstand, strain relief, temperature, current overload, thermal, grounding, voltage withstand, tamper-resistance, resistance to arcing (not the same as arc quenching) and crush-resistance.
