3 backstab attempts with duelist?

[azeth]

I always get 3 backstab attempts on the Duelist timer.

I do have a claw of lightning, but technically i've never hit duelist without a 41% haste equipped. I had sky belt for Kunark premier, had Silver Bracelet of Speed early into Velious & now Claw.

I'd be very curious to find out if the 1% haste over Ragebringer's 40% is the reason we get 3.