I agree; that's what I call type three overload:
The closest I ever got to that was +9 dBm (+58 dBmV) out of a CM3410, when I fed its input -6 dBm (+43 dBmV), which means it hadn't gone into compression yet.
http://www.digitalhome.ca/forum/showpost.php?p=1597002&postcount=3490