For anyone freaking out inexplicably that WM mode will somehow make you spec for spell speed, you're panicking over nothing. Windbite, Venomous Bite etc are and have always been "Weaponskills" (in the actual tooltip text) which are governed by Skill Speed. While they will be the first Weaponskills (in ARR at least) to have a cast time, there is already an established precedence in non-casters' involvement with spell speed. Sword/Shield Oath, Flash, and songs are all considered "Spells" (in the actual tooltip text) and affected by spell speed.

tl;dr you aren't going to need spell speed just because your attacks now have a "cast time".