The first control-click on an unselected link [in RTF(D) items] displays Open Link in the contextual menu. The CM changes to No Guesses Found (etc.) with a second control-click, after it’s been selected by the first control-click.
OS X handles most of the CM (DT only adds the link specific commands and the “Set Title” command) and therefore I don’t know if it’s working as intended ;D