Ya, I saw the sim trial, but I also remember the dted player dropped by 4 ppg or something like that. That team also featured 2 big scorers, clyde and barkley i believe; it also ran a double dt. Lastly, that was under the old engine w/o the defensive shifts. These are alot of differences (plus missing factors) between what most teams face in the wilt matchups.
Why don't you ran another round of sim trials with the following setup: 2 leagues. Both league have 3 teams with the following PF and C slot, Russel + Russell v. Russel + 50ppg Wilt; wilt team have no other major scorer or 1 big perimeter scorer (up to you)
Have one league dt and -3 shift to wilt, other one do not. I can guarantee you Wilt in the -3 shift + dt will do significantly worse.