I've read in various places that 15A receptacles are safe on 20A circuits because the "yoke" (the part that connects the two receptacles to the line) is actually rated for 20 amps.
However, I can't find any documentation for this being true. The Leviton model available at Home Depot only shows 15A on it's spec sheet.
Does anyone have links to any hard evidence of 15A duplex outlets being rated for 20A passthrough? Maybe I'm just not looking in the right places.
EDIT: More references