Recent zombie culture has made viewers accustomed to a speedy zombie, with productions like Dawn of the Dead (2004), 28 Days Later, Dead Set, Left 4 Dead and Zombieland.
But it wasn’t always so. Traditionally a zombie is a slow-moving, groaning, shuffling corpse. After all, their body tissues are decomposing, right? Which is why the movie Shaun of the Dead stayed true to the classic image of the undead.
See, Simon Pegg knows his zombies. He knows about Haitian voodoo folklore. He knows that George Romero introduced the modern movie zombie. He knows the these monsters didn’t crave brains until Dan O’Bannon’s Return of the Living Dead. And Pegg paid homage to the Romero-style ghoul in his own black comedy.

So who better than zed-word purist Pegg to pontificate on the debate of slow vs. fast zombies:
“Zombies are our destiny writ large. Slow and steady in their approach, weak, clumsy, often absurd, the zombie relentlessly closes in, unstoppable, intractable. Death is a disability, not a superpower. It’s hard to run with a cold, let alone the most debilitating malady of them all.”
He makes more great points in this 2008 Guardian article, The Dead and the Quick. Give it read and see if you agree that a speed limit should be enforced on the walking dead.