As Gigasnail posted on alla, with caped haste you can get this delay down to ~78 . . . pretty decent for a zerg if you don't have one of the other options >_>
The low delay might be good for a blood weapon zerg, but you can get a lower delay with a dagger and compensate the skill difference with Feint. That low delay is gonna take ages to get 100% for WS. Best not to bother.