Kiting builds. Are they viable ?

After a severe losing streak I loaded up the nice new practice tool and decided to experiment a bit to see if I could come up with better ways to play my main champ, Kayle. After fiddling around with a couple damage builds I decided to try out something to help me kite out people better and I discovered that I can achieve 460 movespeed on her with . For the early game I can get for 417 movespeed. 417 is an excessive amount of movement speed to have early in the game and you can dance around most champs with that kind of movement speed that early in the game. 460 movespeed is almost as fast as Quinn can go in her level 1 ult with no items so that's tremendous.

I'm curious, are such builds viable or are they just cheesy. Are "kiting builds" or "movespeed" builds viable at all ? Has anyone ever gotten success by abusing such builds ?