Well this isnt DF

This game is waaaay different, and having any 50 agi zombies would be mass murder for any starter -level 10 Player(s)

zombies that wander aimlessly But when They Notice you They Sprint at you.Also It Should Be LIKE L4D When Any normal zombie gets A good Hit Dies.

Yup, JJBenson is right, this is kinda like combat in L4D, unless you attack or go close to a zombie they wont see or notice you, and most of the normal zombies dies from a good hit.

I don't fear fast or slow zombies, the only thing I fear is they will learn how to put on rollerblades. When zombies learn that, humanity is over.

when zombies learn, their not conventional zombies anymore

My opinion Stands.

I actually say both realistically as zombies who are fresh would run like 28 days later or dawn of the dead, but after they get older would slow down like the resident evil zombies.
Or they could be rabie zombies like Left 4 Dead in which case i sugest you run and dont get bit.

I have seen that slower zombies are better in certain situations:
enter, The Zombie Olympics

~ fair enough long distance running fast wins over taking slow
~ but say swimming slow can wade through the water while fast thrashes and swings about in the same spot
~ slower zombies have also been known to climb small fences and walls while faster zombies are stumped by them
~ also, when assaulting a building the fast arrive first and scratch at the door hopelessly while slow zombies have more retained energy and have been known to pick up objects off the floor to smash barricades with
~ say hunting silent prey a fast zombie will run straight on by you hiding there while slow zombies may stay around a bit and wait you out

Technically a zombie would move just as fast as it did in real life so the game is already pretty accurate so far about that, but in reality we can't really tell that because the virus uses the whole brain instead of just 10% they'll be super human or if they'll be worse or the same and technically because the virus is using the brain it is giving it life stomping it from decomposing further from injuries or speeding up the process you never know.

"Kickin ass and gettin paid two of my favourite things."

Fast paced all the way.
Don't c how slow paced zeds would be able to take over the world.
And slow paced zeds are just.. not scary

^Ooooh, you wont be saying that when theres an alley full of them shambeling towards you, just then you notice your exit has been blocked by the zombies you encountered in the other alley, then your only choice is to break into somewhere, and Guess what! As you enter the club, you see the dance floor littered with zombies!

I'm with strik9 (first) on this one, but I guess I'm just too damn New Age.