Another vote for screw terminals... I was told when I started that the holes in the back were for homeowners... real electricians used the screw terminals
You don't have to determine the torque on a stab lock, strip the wire the right length, drive it in and its UL listed. Just like using a hook and the right torque on a screw terminal.
I just had a service call where back stabbed receptacles were used. Lights flickering and 2 rooms dead. I replaced the one that was causing the problem and proposed that we replace all of them with P&S spec grades and perform a complete safety check of the electrical system. Haven't heard back yet, oh well, he probably called a Handyman because he would be cheap and use cheap material as well.