Interesting. Mine are listed as "D 6,7."** That is the fitters notes on my summary sheet, so I guess that means D6 1/2?? I don't know. All I know is that they don't feel particularly light or heavy to me (I have KBS Tour 120's, BTW) and I love them.
Mine are also long and upright.
** FWIW, Sand wedge says D 7,8 and Lob wedge says D 8,9
You are a beast! Are your mid and long irons that heavy as well? Maybe because of the extra length?