Originally Posted by BimmerJon
I hear ya, but just in case. Outlets and lights DO fail sometimes. Its not impossible.
You are absolutely correct.
Thing is, the number of times a receptacle will actually fail, I will take the chance and do it the approved and common way and use the screws. IMO to pigtail in a residence is useless overkill and only done to be self satisfying, like saying: "I do a better job. I pigtail.
Even the cheapest $.39 receptacle is rated and capable of carrying and passing through ANY circuit it is legally installed on. The key is more workmanship than parts failure.
Commercially, where it is likely that you will have to replace devices live, I can totally see the merit in it. In a residence you DO NOT have to work live and nothing is so critical (other than maybe medical equipment, but that's a different and rare situation).