why/how is scoundrel tree for TR giving a hidden speed boost?

rotatorkuf

i was trying different builds today

and i noticed, each time i was specced scoundrel

i had a VERY NOTICEABLE speed buff...this is also as whisperknife mind you, with only sneak attack and the artifact bonus slotted.....i'm FLYING across the screen

what am i not seeing in the scoundrel path that's doing this haha, another bugged TR feature?

i'll post video later if i don't get lazy

yup...all those rogues you see flying around your screen in pvp....running dat bugged scoundrel build

skullcracker is the guilty capstone...why is it giving a ninja speed buff?

well, i tried covering the same distance with and without skullcracker

without skullcracker - 9.6 seconds

with skullcracker - 6.3 seconds

MASSIVE speed buff

video: https://www.youtube.com/watch?v=_rgL6_75Iik&feature=youtu.be

first, i run without speedcracker...oops skullcracker

@ 18 seconds, i spec into skullcracker

@ 23 sconds, i'm flying

ahhhh...checked on PTS...updated tooltip "increases movement speed by 15%"