In a word, yes, even though the ANSI/SAE spec for plugs/sockets here in the U.S. is slightly different.
The U.S. spec for the socket is 20.97+/- 4mm
The Euro spec for the socket is 21.46mm +/- 5mm.
So they make the grounding springs on the plugs stiff enough to hold in a U.S. spec socket without vibrating loose, but not so tight as not to fit well into a Euro socket.