Interesting about the outlaw of backstabbing with #12. My house was built in '89 and every receptacle is backstabbed with #12.
I was never really happy about it, but it has been problem free for the last 16 years and I do load some of those circuits pretty hard. I am inclined to agree, with George amd Sandro, that it is more a matter of install and product quality than the connection methode itself.

[This message has been edited by IanR (edited 10-21-2005).]