From a nice blue (http://blue.cardplace.com/newcache/us/77597413.htm) by Tseric.
TL.
Quote from: TsericOk, so the old rage formula averaged a Warrior's rage with 2.5 times weapon speed.
* Main hand hit: 2.5*speed
* Off hand hit: 1.25*speed
* Main hand crit: 5*speed
* Off hand crit: 2.5*speed
The change that occurred in the 2.0.10 patch increased the multiplier to 3.5 times weapon speed.
* Main hand hit: 3.5*speed
* Off hand hit: 1.75*speed
* Main hand crit: 7*speed
* Off hand crit: 3.5*speed
That is what was changed.
Rage Gained from dealing damage = ((Damage Dealt) / (Rage Conversion at Your Level) * 7.5 + (Weapon Speed * Factor))/2