(I think 1875 W @ 125 V nameplate just passes muster for 15 A.)
Backstabbing takes less volume in the box and when that matters, I also occasionally backstab the line in light switches only when daisychaining. If I ever learn of one going bad, I'm sure I'll give them up altogether. I would really prefer a pre-made octopus (or star without a wirenut) for distributing power to multiple devices in a box.
I have seen a lot of bad backstabs in receptacles. Whether they were originally tight, I cannot say, since they weren't my work. But I don't trust them. My rule with the switches is that if it doesn't bite on the first try, I consider it defective and grab another switch or use the screw and a pigtail instead if I can make it fit.
I like the way the GFCIs connect because no wire bending is needed. However, I think they could do better by fixing one contact in place somehow or spring loading it to open. Sometimes the gap doesn't open correctly to receive the wire.
I also like the way the stripped part of the conductor is protected. I look forward to the day when there are just recessed set screws on the sides like on circuit breakers. Ever wrap your hand around an energized receptacle?
