Magicians and Weapon Speed

I've always been under the impression that weapon speed never affected mages except for explosion on a F/P Mage. But now I see Bishops trying to get Decent SI or Attack Speed +1 Inner abilities. Has something changed recently or am I misunderstanding it?

Skills are still not affected by the speed of the weapon but Speed Infusion and Inner Ability work just like Spell Booster does in speeding up the casting speeds of skills.
I have Decent SI myself and I'm also hoping to obtain the Inner Ability soon.

K Thanks. That clears it up.