No more level-based partial resists in 4.0?

I haven't seen anyone else comment on this, but it seems level-based partial resists have gone away in 4.0. Previously, all spells lost 6% damage on average against a target 3 levels higher. But, examining the log of the night I raided as Moonkin this week revealed no evidence of partial resists, and I didn't observe any shooting at a level 83 target dummy for a few minutes.

Best I can tell, that mechanic is gone.