Is Duncan going head to head with someone as good as Prime Duncan? I missed that one.
When Shaq and Duncan went head to head in their primes, Shaq bested him. To me, this is the measure that matters most. Furthermore, Shaq never lost in the first round as a 1 or 2 seed. In fact, I don't think him or Kobe ever lost in the 1st or 2nd round as a 1 or 2 seed (might be wrong 1 year) while Spurs have done so on numerous occasions (I won't hold the 2000 season against Duncan since he got hurt). That's why I can't put Duncan ahead of Shaq, at least not yet.
Duncan at 37 > Shaq at 37, but Shaq was better in his youth at a comparable age.
I just think the Duncan > Shaq stuff is because people only remember Shaq from 2000 on while they remember him being a beast then they also remember him aging and they forgot what he did from '92-00.