Zed interactions with Sudden Impact Rune?

> Gain a burst of Lethality and Magic Penetration after using a dash, leap, blink, teleport, or after on leaving stealth. After using Zed's ult, this rune works just fine. But teleporting to your W shadow will not give you the effects of this rune. Just wanna know, is this a bug, gameplay decision, or is Zed's W just not a blink or teleport? I can see it being a gameplay decision, since 10 Lethality every trade before the midlaner gets a ninja tabi or armguard is pretty busted.
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