Can I myself add the fact that you still need to overcome hit loss given the Dual Wield penalty? I mean, sure your specials are based off the same hit, but last I checked there isn't an "infinite rage" scenario that lets you Rune/Frost Strike every white attack even on 2H (let alone 1h's which are predominately faster, even if they're "slow").
And sure, white hits may not be the bulk of your threat gen, they still count for a nice chunk.